This page contains my solutions of Codeforces problems. They are in C++ language.
| Index | Problem ID | Problem Name | Question | Solution |
|---|---|---|---|---|
| 1 | 1 A | Theatre Square | Question | Solution |
| 2 | 2 A | Winner | Question | Solution |
| 3 | 4 A | Watermelon | Question | Solution |
| 4 | 4 C | Registration System | Question | Solution |
| 5 | 5 C | Longest Regular Bracket Sequence | Question | Solution |
| 6 | 9 A | Die Roll | Question | Solution |
| 7 | 9 B | Running Student | Question | Solution |
| 8 | 11 A | Increasing Sequence | Question | Solution |
| 9 | 17 A | Noldbach problem | Question | Solution |
| 10 | 22 A | Second Order Statistics | Question | Solution |
| 11 | 29 A | Spit Problem | Question | Solution |
| 12 | 31 A | Worms Evolution | Question | Solution |
| 13 | 34 A | Reconnaissance 2 | Question | Solution |
| 14 | 34 B | Sale | Question | Solution |
| 15 | 40 A | Find Color | Question | Solution |
| 16 | 41 A | Translation | Question | Solution |
| 17 | 44 A | Indian Summer | Question | Solution |
| 18 | 45 A | Codecraft III | Question | Solution |
| 19 | 50 A | Domino piling | Question | Solution |
| 20 | 59 A | Word | Question | Solution |
| 21 | 65 B | Harry Potter and the History of Magic | Question | Solution |
| 22 | 71 A | Way Too Long Words | Question | Solution |
| 23 | 74 A | Room Leader | Question | Solution |
| 24 | 84 A | Toy Army | Question | Solution |
| 25 | 96 B | Lucky Numbers (easy) | Question | Solution |
| 26 | 110 A | Nearly Lucky Number | Question | Solution |
| 27 | 112 A | Petya and Strings | Question | Solution |
| 28 | 112 B | Petya and Square | Question | Solution |
| 29 | 116 A | Tram | Question | Solution |
| 30 | 118 B | Present from Lena | Question | Solution |
| 31 | 120 F | Spiders | Question | Solution |
| 32 | 122 B | Lucky Substring | Question | Solution |
| 33 | 122 A | Lucky Division | Question | Solution |
| 34 | 131 A | cAPS lOCK | Question | Solution |
| 35 | 136 A | Presents | Question | Solution |
| 36 | 141 A | Amusing Joke | Question | Solution |
| 37 | 143 A | Help Vasilisa the Wise 2 | Question | Solution |
| 38 | 144 A | Arrival of the General | Question | Solution |
| 39 | 148 A | Insomnia cure | Question | Solution |
| 40 | 151 A | Soft Drinking | Question | Solution |
| 41 | 154 C | Gourmet Cat | Question | Solution |
| 42 | 155 A | I_love_%username% | Question | Solution |
| 43 | 158 A | Next Round | Question | Solution |
| 44 | 158 B | Taxi | Question | Solution |
| 45 | 173 A | Rock-Paper-Scissors | Question | Solution |
| 46 | 189 A | Cut Ribbon | Question | Solution |
| 47 | 200 B | Drinks | Question | Solution |
| 48 | 208 A | Dubstep | Question | Solution |
| 49 | 217 A | Ice Skating | Question | Solution |
| 50 | 230 B | T-primes | Question | Solution |
| 51 | 231 A | Team | Question | Solution |
| 52 | 236 A | Boy or Girl | Question | Solution |
| 53 | 239 A | Two Bags of Potatoes | Question | Solution |
| 54 | 251 A | Points on Line | Question | Solution |
| 55 | 258 A | Little Elephant and Bits | Question | Solution |
| 56 | 263 A | Beautiful Matrix | Question | Solution |
| 57 | 266 B | Queue at the School | Question | Solution |
| 58 | 266 A | Stones on the Table | Question | Solution |
| 59 | 268 A | Games | Question | Solution |
| 60 | 271 D | Good Substrings | Question | Solution |
| 61 | 271 A | Beautiful Year | Question | Solution |
| 62 | 279 B | Books | Question | Solution |
| 63 | 281 A | Word Capitalization | Question | Solution |
| 64 | 282 A | Bit++ | Question | Solution |
| 65 | 299 A | Ksusha and Array | Question | Solution |
| 66 | 313 A | Ilya and Bank Account | Question | Solution |
| 67 | 318 A | Even Odds | Question | Solution |
| 68 | 339 A | Helpful Maths | Question | Solution |
| 69 | 343 B | Alternating Current | Question | Solution |
| 70 | 344 A | Magnets | Question | Solution |
| 71 | 348 A | Mafia | Question | Solution |
| 72 | 349 A | Cinema Line | Question | Solution |
| 73 | 381 B | Sereja and Stairs | Question | Solution |
| 74 | 411 A | Password Check | Question | Solution |
| 75 | 414 B | Mashmokh and ACM | Question | Solution |
| 76 | 416 A | Guess a number! | Question | Solution |
| 77 | 421 A | Pasha and Hamsters | Question | Solution |
| 78 | 433 B | Kuriyama Mirai's Stones | Question | Solution |
| 79 | 450 A | Jzzhu and Children | Question | Solution |
| 80 | 456 B | Fedya and Maths | Question | Solution |
| 81 | 466 A | Cheap Travel | Question | Solution |
| 82 | 471 A | MUH and Sticks | Question | Solution |
| 83 | 472 A | Design Tutorial Learn from Math | Question | Solution |
| 84 | 474 B | Worms | Question | Solution |
| 85 | 478 C | Table Decorations | Question | Solution |
| 86 | 486 A | Calculating Function | Question | Solution |
| 87 | 489 B | BerSU Ball | Question | Solution |
| 88 | 492 B | Vanya and Lanterns | Question | Solution |
| 89 | 492 A | Vanya and Cubes | Question | Solution |
| 90 | 510 A | Fox And Snake | Question | Solution |
| 91 | 514 A | Chewbaсca and Number | Question | Solution |
| 92 | 520 B | Two Buttons | Question | Solution |
| 93 | 525 A | Vitaliy and Pie | Question | Solution |
| 94 | 545 C | Woodcutters | Question | Solution |
| 95 | 546 B | Soldier and Badges | Question | Solution |
| 96 | 546 C | Soldier and Cards | Question | Solution |
| 97 | 546 A | Soldier and Bananas | Question | Solution |
| 98 | 550 B | Preparing Olympiad | Question | Solution |
| 99 | 550 C | Divisibility by Eight | Question | Solution |
| 100 | 551 A | GukiZ and Contest | Question | Solution |
| 101 | 579 A | Raising Bacteria | Question | Solution |
| 102 | 584 A | Olesya and Rodion | Question | Solution |
| 103 | 599 A | Patrick and Shopping | Question | Solution |
| 104 | 600 B | Queries about less or equal elements | Question | Solution |
| 105 | 617 A | Elephant | Question | Solution |
| 106 | 628 A | Tennis Tournament | Question | Solution |
| 107 | 630 C | Lucky Numbers | Question | Solution |
| 108 | 630 J | Divisibility | Question | Solution |
| 109 | 630 A | Again Twenty Five! | Question | Solution |
| 110 | 632 C | The Smallest String Concatenation | Question | Solution |
| 111 | 653 A | Bear and Three Balls | Question | Solution |
| 112 | 655 B | Mischievous Mess Makers | Question | Solution |
| 113 | 660 A | Co-prime Array | Question | Solution |
| 114 | 665 E | Beautiful Subarrays | Question | Solution |
| 115 | 677 A | Vanya and Fence | Question | Solution |
| 116 | 686 A | Free Ice Cream | Question | Solution |
| 117 | 705 A | Hulk | Question | Solution |
| 118 | 706 B | Interesting drink | Question | Solution |
| 119 | 706 D | Vasiliy's Multiset | Question | Solution |
| 120 | 712 A | Memory and Crow | Question | Solution |
| 121 | 734 A | Anton and Danik | Question | Solution |
| 122 | 742 A | Arpa’s hard exam and Mehrdad’s naive cheat | Question | Solution |
| 123 | 749 A | Bachgold Problem | Question | Solution |
| 124 | 753 A | Santa Claus and Candies | Question | Solution |
| 125 | 762 A | k-th divisor | Question | Solution |
| 126 | 776 B | Sherlock and his girlfriend | Question | Solution |
| 127 | 782 B | The Meeting Place Cannot Be Changed | Question | Solution |
| 128 | 791 A | Bear and Big Brother | Question | Solution |
| 129 | 794 A | Bank Robbery | Question | Solution |
| 130 | 816 B | Karen and Coffee | Question | Solution |
| 131 | 825 A | Binary Protocol | Question | Solution |
| 132 | 854 A | Fraction | Question | Solution |
| 133 | 855 A | Tom Riddle's Diary | Question | Solution |
| 134 | 873 D | Merge Sort | Question | Solution |
| 135 | 888 A | Local Extrema | Question | Solution |
| 136 | 903 C | Boxes Packing | Question | Solution |
| 137 | 915 B | Browser | Question | Solution |
| 138 | 965 E | Short Code | Question | Solution |
| 139 | 977 E | Cyclic Components | Question | Solution |
| 140 | 977 A | Wrong Subtraction | Question | Solution |
| 141 | 984 A | Game | Question | Solution |
| 142 | 994 A | Fingerprints | Question | Solution |
| 143 | 1006 C | Three Parts of the Array | Question | Solution |
| 144 | 1015 B | Obtaining the String | Question | Solution |
| 145 | 1015 C | Songs Compression | Question | Solution |
| 146 | 1023 C | Bracket Subsequence | Question | Solution |
| 147 | 1033 B | Square Difference | Question | Solution |
| 148 | 1068 A | Birthday | Question | Solution |
| 149 | 1076 C | Meme Problem | Question | Solution |
| 150 | 1088 A | Ehab and another construction problem | Question | Solution |
| 151 | 1097 B | Petr and a Combination Lock | Question | Solution |
| 152 | 1106 C | Lunar New Year and Number Division | Question | Solution |
| 153 | 1114 A | Got Any Grapes? | Question | Solution |
| 154 | 1118 B | Tanya and Candies | Question | Solution |
| 155 | 1131 C | Birthday | Question | Solution |
| 156 | 1133 A | Middle of the Contest | Question | Solution |
| 157 | 1144 C | Two Shuffled Sequences | Question | Solution |
| 158 | 1154 A | Restoring Three Numbers | Question | Solution |
| 159 | 1166 A | Silent Classroom | Question | Solution |
| 160 | 1179 A | Valeriy and Deque | Question | Solution |
| 161 | 1196 A | Three Piles of Candies | Question | Solution |
| 162 | 1201 C | Maximum Median | Question | Solution |
| 163 | 1203 C | Common Divisors | Question | Solution |
| 164 | 1234 B2 | Social Network (hard version) | Question | Solution |
| 165 | 1234 B1 | Social Network (easy version) | Question | Solution |
| 166 | 1279 A | New Year Garland | Question | Solution |
| 167 | 1283 A | Minutes Before the New Year | Question | Solution |
| 168 | 1283 C | Friends and Gifts | Question | Solution |
| 169 | 1285 C | Fadi and LCM | Question | Solution |
| 170 | 1295 A | Display The Number | Question | Solution |
| 171 | 1296 A | Array with Odd Sum | Question | Solution |
| 172 | 1301 A | Three Strings | Question | Solution |
| 173 | 1311 A | Add Odd or Subtract Even | Question | Solution |
| 174 | 1312 A | Two Regular Polygons | Question | Solution |
| 175 | 1325 A | EhAb AnD gCd | Question | Solution |
| 176 | 1328 A | Divisibility Problem | Question | Solution |
| 177 | 1341 A | Nastya and Rice | Question | Solution |
| 178 | 1343 B | Balanced Array | Question | Solution |
| 179 | 1352 C | K-th Not Divisible by n | Question | Solution |
| 180 | 1360 B | Honest Coach | Question | Solution |
| 181 | 1364 A | XXXXX | Question | Solution |
| 182 | 1367 B | Even Array | Question | Solution |
| 183 | 1367 A | Short Substrings | Question | Solution |
| 184 | 1388 A | Captain Flint and Crew Recruitment | Question | Solution |
| 185 | 1389 A | LCM Problem | Question | Solution |
| 186 | 1391 B | Fix You | Question | Solution |
| 187 | 1399 A | Remove Smallest | Question | Solution |
| 188 | 1401 B | Ternary Sequence | Question | Solution |
| 189 | 1416 C | XOR Inverse | Question | Solution |
| 190 | 1421 B | Putting Bricks in the Wall | Question | Solution |
| 191 | 1426 A | Floor Number | Question | Solution |
| 192 | 1440 B | Sum of Medians | Question | Solution |
| 193 | 1471 A | Strange Partition | Question | Solution |
| 194 | 1475 A | Odd Divisor | Question | Solution |
| 195 | 1497 C1 | k-LCM (easy version) | Question | Solution |
| 196 | 1497 C2 | k-LCM (hard version) | Question | Solution |
| 197 | 1512 A | Spy Detected! | Question | Solution |
| 198 | 1526 C2 | Potions (Hard Version) | Question | Solution |
| 199 | 1526 C1 | Potions (Easy Version) | Question | Solution |
| 200 | 1534 A | Colour the Flag | Question | Solution |
| 201 | 1536 C | Diluc and Kaeya | Question | Solution |
| 202 | 1537 A | Arithmetic Array | Question | Solution |
| 203 | 1537 B | Bad Boy | Question | Solution |
| 204 | 1538 C | Number of Pairs | Question | Solution |
| 205 | 1538 F | Interesting Function | Question | Solution |
| 206 | 1543 A | Exciting Bets | Question | Solution |
| 207 | 1553 A | Digits Sum | Question | Solution |
| 208 | 1559 A | Mocha and Math | Question | Solution |
| 209 | 1561 A | Simply Strange Sort | Question | Solution |
| 210 | 1579 E1 | Permutation Minimization by Deque | Question | Solution |
| 211 | 1582 B | Luntik and Subsequences | Question | Solution |
| 212 | 1593 B | Make it Divisible by 25 | Question | Solution |
| 213 | 1594 C | Make Them Equal | Question | Solution |
| 214 | 1605 A | A.M. Deviation | Question | Solution |
| 215 | 1606 A | AB Balance | Question | Solution |
| 216 | 1607 B | Odd Grasshopper | Question | Solution |
| 217 | 1613 A | Long Comparison | Question | Solution |
| 218 | 1624 B | Make AP | Question | Solution |
| 219 | 1633 A | Div. 7 | Question | Solution |
| 220 | 1665 B | Array Cloning Technique | Question | Solution |
| 221 | 1666 D | Deletive Editing | Question | Solution |
| 222 | 1669 F | Eating Candies | Question | Solution |
| 223 | 1675 B | Make It Increasing | Question | Solution |
| 224 | 1676 A | Lucky | Question | Solution |
| 225 | 1679 A | AvtoBus | Question | Solution |
| 226 | 1680 A | Minimums and Maximums | Question | Solution |
| 227 | 1681 C | Double Sort | Question | Solution |
| 228 | 1692 A | Marathon | Question | Solution |
| 229 | 1696 B | NIT Destroys the Universe | Question | Solution |
| 230 | 1703 B | ICPC Balloons | Question | Solution |
| 231 | 1703 A | YES or YES | Question | Solution |
| 232 | 1719 A | Chip Game | Question | Solution |
| 233 | 1719 B | Mathematical Circus | Question | Solution |
| 234 | 1721 B | Deadly Laser | Question | Solution |
| 235 | 1726 A | Mainak and Array | Question | Solution |
| 236 | 1730 B | Meeting on the Line | Question | Solution |
| 237 | 1742 C | Stripes | Question | Solution |
| 238 | 1742 A | Sum | Question | Solution |
| 239 | 1746 B | Rebellion | Question | Solution |
| 240 | 1748 A | The Ultimate Square | Question | Solution |
| 241 | 1758 B | XOR = Average | Question | Solution |
| 242 | 1760 A | Medium Number | Question | Solution |
| 243 | 1761 A | Two Permutations | Question | Solution |
| 244 | 1765 K | Torus Path | Question | Solution |
| 245 | 1765 M | Minimum LCM | Question | Solution |
| 246 | 1765 B | Broken Keyboard | Question | Solution |
| 247 | 1765 E | Exchange | Question | Solution |
| 248 | 1766 A | Extremely Round | Question | Solution |
| 249 | 1773 F | Football | Question | Solution |
| 250 | 1777 A | Everybody Likes Good Arrays! | Question | Solution |
| 251 | 1783 A | Make it Beautiful | Question | Solution |
| 252 | 1788 A | One and Two | Question | Solution |
| 253 | 1789 A | Serval and Mocha's Array | Question | Solution |
| 254 | 1791 C | Prepend and Append | Question | Solution |
| 255 | 1791 B | Following Directions | Question | Solution |
| 256 | 1792 B | Stand-up Comedian | Question | Solution |
| 257 | 1792 A | GamingForces | Question | Solution |
| 258 | 1794 B | Not Dividing | Question | Solution |
| 259 | 1795 B | Ideal Point | Question | Solution |
| 260 | 1800 C1 | Powering the Hero (easy version) | Question | Solution |
| 261 | 1800 C2 | Powering the Hero (hard version) | Question | Solution |
| 262 | 1800 A | Is It a Cat | Question | Solution |
| 263 | 1805 A | We Need the Zero | Question | Solution |
| 264 | 1806 A | Walking Master | Question | Solution |
| 265 | 1807 D | Odd Queries | Question | Solution |
| 266 | 1811 A | Insert Digit | Question | Solution |
| 267 | 1814 A | Coins | Question | Solution |
| 268 | 1818 B | Indivisible | Question | Solution |
| 269 | 1822 A | TubeTube Feed | Question | Solution |
| 270 | 1822 C | Bun Lover | Question | Solution |
| 271 | 1828 A | Divisible Array | Question | Solution |
| 272 | 1828 B | Permutation Swap | Question | Solution |
| 273 | 1829 E | The Lakes | Question | Solution |
| 274 | 1829 B | Blank Space | Question | Solution |
| 275 | 1829 A | Love Story | Question | Solution |
| 276 | 1829 C | Mr. Perfectly Fine | Question | Solution |
| 277 | 1829 D | Gold Rush | Question | Solution |
| 278 | 1831 A | Twin Permutations | Question | Solution |
| 279 | 1832 A | New Palindrome | Question | Solution |
| 280 | 1832 B | Maximum Sum | Question | Solution |
| 281 | 1833 A | Musical Puzzle | Question | Solution |
| 282 | 1833 B | Restore the Weather | Question | Solution |
| 283 | 1833 C | Vlad Building Beautiful Array | Question | Solution |
| 284 | 1834 A | Unit Array | Question | Solution |
| 285 | 1837 B | Comparison String | Question | Solution |
| 286 | 1837 A | Grasshopper on a Line | Question | Solution |
| 287 | 1841 B | Keep it Beautiful | Question | Solution |
| 288 | 1843 B | Long Long | Question | Solution |
| 289 | 1843 A | Sasha and Array Coloring | Question | Solution |
| 290 | 1844 A | Subtraction Game | Question | Solution |
| 291 | 1845 A | Forbidden Integer | Question | Solution |
| 292 | 1846 A | Rudolph and Cut the Rope | Question | Solution |
| 293 | 1846 C | Rudolf and the Another Competition | Question | Solution |
| 294 | 1846 B | Rudolph and Tic-Tac-Toe | Question | Solution |
| 295 | 1848 A | Vika and Her Friends | Question | Solution |
| 296 | 1849 A | Morning Sandwich | Question | Solution |
| 297 | 1849 B | Monsters | Question | Solution |
| 298 | 1850 F | We Were Both Children | Question | Solution |
| 299 | 1850 B | Ten Words of Wisdom | Question | Solution |
| 300 | 1850 D | Balanced Round | Question | Solution |
| 301 | 1850 C | Word on the Paper | Question | Solution |
| 302 | 1850 A | To My Critics | Question | Solution |
| 303 | 1851 C | Tiles Comeback | Question | Solution |
| 304 | 1851 A | Escalator Conversations | Question | Solution |
| 305 | 1851 F | Lisa and the Martians | Question | Solution |
| 306 | 1851 B | Parity Sort | Question | Solution |
| 307 | 1853 A | Desorting | Question | Solution |
| 308 | 1855 A | Dalton the Teacher | Question | Solution |
| 309 | 1855 B | Longest Divisors Interval | Question | Solution |
| 310 | 1856 B | Good Arrays | Question | Solution |
| 311 | 1857 B | Maximum Rounding | Question | Solution |
| 312 | 1857 A | Array Coloring | Question | Solution |
| 313 | 1857 C | Assembly via Minimums | Question | Solution |
| 314 | 1858 A | Buttons | Question | Solution |
| 315 | 1859 A | United We Stand | Question | Solution |
| 316 | 1860 A | Not a Substring | Question | Solution |
| 317 | 1862 A | Gift Carpet | Question | Solution |
| 318 | 1862 B | Sequence Game | Question | Solution |
| 319 | 1863 A | Channel | Question | Solution |
| 320 | 1864 A | Increasing and Decreasing | Question | Solution |
| 321 | 1864 B | Swap and Reverse | Question | Solution |
| 322 | 1866 A | Ambitious Kid | Question | Solution |
| 323 | 1869 A | Make It Zero | Question | Solution |
| 324 | 1870 A | MEXanized Array | Question | Solution |
| 325 | 1872 B | The Corridor or There and Back Again | Question | Solution |
| 326 | 1872 C | Non-coprime Split | Question | Solution |
| 327 | 1872 A | Two Vessels | Question | Solution |
| 328 | 1873 C | Target Practice | Question | Solution |
| 329 | 1873 E | Building an Aquarium | Question | Solution |
| 330 | 1873 B | Good Kid | Question | Solution |
| 331 | 1873 D | 1D Eraser | Question | Solution |
| 332 | 1873 A | Short Sort | Question | Solution |
| 333 | 1875 A | Jellyfish and Undertale | Question | Solution |
| 334 | 1876 A | Helmets in Night Light | Question | Solution |
| 335 | 1877 A | Goals of Victory | Question | Solution |
| 336 | 1878 C | Vasilije in Cacak | Question | Solution |
| 337 | 1878 A | How Much Does Daytona Cost | Question | Solution |
| 338 | 1878 B | Aleksa and Stack | Question | Solution |
| 339 | 1879 B | Chips on the Board | Question | Solution |
| 340 | 1879 A | Rigged! | Question | Solution |
| 341 | 1881 C | Perfect Square | Question | Solution |
| 342 | 1881 B | Three Threadlets | Question | Solution |
| 343 | 1881 A | Don't Try to Count | Question | Solution |
| 344 | 1883 B | Chemistry | Question | Solution |
| 345 | 1883 C | Raspberries | Question | Solution |
| 346 | 1890 A | Doremy's Paint 3 | Question | Solution |
| 347 | 1890 B | Qingshan Loves Strings | Question | Solution |
| 348 | 1891 A | Sorting with Twos | Question | Solution |
| 349 | 1894 A | Secret Sport | Question | Solution |
| 350 | 1895 B | Points and Minimum Distance | Question | Solution |
| 351 | 1895 A | Treasure Chest | Question | Solution |
| 352 | 1896 A | Jagged Swaps | Question | Solution |
| 353 | 1896 B | AB Flipping | Question | Solution |
| 354 | 1898 A | Milica and String | Question | Solution |
| 355 | 1899 A | Game with Integers | Question | Solution |
| 356 | 1900 A | Cover in Water | Question | Solution |
| 357 | 1900 B | Laura and Operations | Question | Solution |
| 358 | 1901 A | Line Trip | Question | Solution |
| 359 | 1902 A | Binary Imbalance | Question | Solution |
| 360 | 1903 A | Halloumi Boxes | Question | Solution |
| 361 | 1904 B | Collecting Game | Question | Solution |
| 362 | 1904 A | Forked! | Question | Solution |
| 363 | 1905 A | Constructive Problems | Question | Solution |
| 364 | 1905 B | Begginer's Zelda | Question | Solution |
| 365 | 1905 C | Largest Subsequence | Question | Solution |
| 366 | 1907 B | YetnotherrokenKeoard | Question | Solution |
| 367 | 1907 A | Rook | Question | Solution |
| 368 | 1907 C | Removal of Unattractive Pairs | Question | Solution |
| 369 | 1909 A | Distinct Buttons | Question | Solution |
| 370 | 1912 L | LOL Lovers | Question | Solution |
| 371 | 1913 C | Game with Multiset | Question | Solution |
| 372 | 1913 B | Swap and Delete | Question | Solution |
| 373 | 1913 A | Rating Increase | Question | Solution |
| 374 | 1914 A | Problemsolving Log | Question | Solution |
| 375 | 1914 C | Quests | Question | Solution |
| 376 | 1914 E1 | Game with Marbles (Easy Version) | Question | Solution |
| 377 | 1914 B | Preparing for the Contest | Question | Solution |
| 378 | 1914 E2 | Game with Marbles (Hard Version) | Question | Solution |
| 379 | 1914 D | Three Activities | Question | Solution |
| 380 | 1915 B | Not Quite Latin Square | Question | Solution |
| 381 | 1915 E | Romantic Glasses | Question | Solution |
| 382 | 1915 A | Odd One Out | Question | Solution |
| 383 | 1915 D | Unnatural Language Processing | Question | Solution |
| 384 | 1915 C | Can I Square | Question | Solution |
| 385 | 1916 B | Two Divisors | Question | Solution |
| 386 | 1916 A | 2023 | Question | Solution |
| 387 | 1916 D | Mathematical Problem | Question | Solution |
| 388 | 1916 C | Training Before the Olympiad | Question | Solution |
| 389 | 1917 B | Erase First or Second Letter | Question | Solution |
| 390 | 1917 A | Least Product | Question | Solution |
| 391 | 1918 A | Brick Wall | Question | Solution |
| 392 | 1918 B | Minimize Inversions | Question | Solution |
| 393 | 1919 B | Plus-Minus Split | Question | Solution |
| 394 | 1919 A | Wallet Exchange | Question | Solution |
| 395 | 1920 B | Summation Game | Question | Solution |
| 396 | 1920 A | Satisfying Constraints | Question | Solution |
| 397 | 1921 D | Very Different Array | Question | Solution |
| 398 | 1921 B | Arranging Cats | Question | Solution |
| 399 | 1921 A | Square | Question | Solution |
| 400 | 1921 C | Sending Messages | Question | Solution |
| 401 | 1923 A | Moving Chips | Question | Solution |
| 402 | 1923 B | Monsters Attack! | Question | Solution |
| 403 | 1927 D | Find the Different Ones! | Question | Solution |
| 404 | 1927 C | Choose the Different Ones | Question | Solution |
| 405 | 1927 E | Klever Permutation | Question | Solution |
| 406 | 1927 A | Make it White | Question | Solution |
| 407 | 1927 B | Following the String | Question | Solution |
| 408 | 1928 B | Equalize | Question | Solution |
| 409 | 1928 A | Rectangle Cutting | Question | Solution |
| 410 | 1929 A | Sasha and the Beautiful Array | Question | Solution |
| 411 | 1929 B | Sasha and the Drawing | Question | Solution |
| 412 | 1930 B | Permutation Printing | Question | Solution |
| 413 | 1930 A | Maximise The Score | Question | Solution |
| 414 | 1931 A | Recovering a Small String | Question | Solution |
| 415 | 1931 B | Make Equal | Question | Solution |
| 416 | 1931 C | Make Equal Again | Question | Solution |
| 417 | 1933 C | Turtle Fingers Count the Values of k | Question | Solution |
| 418 | 1933 A | Turtle Puzzle Rearrange and Negate | Question | Solution |
| 419 | 1933 B | Turtle Math Fast Three Task | Question | Solution |
| 420 | 1945 A | Setting up Camp | Question | Solution |
| 421 | 1954 C | Long Multiplication | Question | Solution |
| 422 | 1955 C | Inhabitant of the Deep Sea | Question | Solution |
| 423 | 1955 B | Progressive Square | Question | Solution |
| 424 | 1955 E | Long Inversions | Question | Solution |
| 425 | 1955 D | Inaccurate Subsequence Search | Question | Solution |
| 426 | 1955 A | Yogurt Sale | Question | Solution |
| 427 | 1955 F | Unfair Game | Question | Solution |
| 428 | 1956 B | Nene and the Card Game | Question | Solution |
| 429 | 1956 C | Nene's Magical Matrix | Question | Solution |
| 430 | 1956 A | Nene's Game | Question | Solution |
| 431 | 1957 B | A BIT of a Construction | Question | Solution |
| 432 | 1957 A | Stickogon | Question | Solution |
| 433 | 1957 C | How Does the Rook Move | Question | Solution |
| 434 | 1968 B | Prefiquence | Question | Solution |
| 435 | 1968 F | Equal XOR Segments | Question | Solution |
| 436 | 1968 G1 | Division + LCP (easy version) | Question | Solution |
| 437 | 1968 C | Assembly via Remainders | Question | Solution |
| 438 | 1968 D | Permutation Game | Question | Solution |
| 439 | 1968 A | Maximize | Question | Solution |
| 440 | 1968 E | Cells Arrangement | Question | Solution |
| 441 | 1969 A | Two Friends | Question | Solution |
| 442 | 1969 B | Shifts and Sorting | Question | Solution |
| 443 | 1970 A1 | Balanced Shuffle (Easy) | Question | Solution |
| 444 | 1971 E | Find the Car | Question | Solution |
| 445 | 1971 A | My First Sorting Problem | Question | Solution |
| 446 | 1971 D | Binary Cut | Question | Solution |
| 447 | 1971 C | Clock and Strings | Question | Solution |
| 448 | 1971 F | Circle Perimeter | Question | Solution |
| 449 | 1971 B | Different String | Question | Solution |
| 450 | 1971 G | XOUR | Question | Solution |
| 451 | 1976 B | Increase Decrease Copy | Question | Solution |
| 452 | 1976 A | Verify Password | Question | Solution |
| 453 | 1977 A | Little Nikita | Question | Solution |
| 454 | 1978 B | New Bakery | Question | Solution |
| 455 | 1978 A | Alice and Books | Question | Solution |
| 456 | 1979 C | Earning on Bets | Question | Solution |
| 457 | 1979 B | XOR Sequences | Question | Solution |
| 458 | 1979 A | Guess the Maximum | Question | Solution |
| 459 | 1980 A | Problem Generator | Question | Solution |
| 460 | 1980 B | Choosing Cubes | Question | Solution |
| 461 | 1980 D | GCD-sequence | Question | Solution |
| 462 | 1980 C | Sofia and the Lost Operations | Question | Solution |
| 463 | 1981 B | Turtle and an Infinite Sequence | Question | Solution |
| 464 | 1981 C | Turtle and an Incomplete Sequence | Question | Solution |
| 465 | 1981 A | Turtle and Piggy Are Playing a Game | Question | Solution |
| 466 | 1982 B | Collatz Conjecture | Question | Solution |
| 467 | 1982 C | Boring Day | Question | Solution |
| 468 | 1982 D | Beauty of the mountains | Question | Solution |
| 469 | 1982 A | Soccer | Question | Solution |
| 470 | 1983 F | array-value | Question | Solution |
| 471 | 1985 E | Secret Box | Question | Solution |
| 472 | 1985 B | Maximum Multiple Sum | Question | Solution |
| 473 | 1985 A | Creating Words | Question | Solution |
| 474 | 1985 F | Final Boss | Question | Solution |
| 475 | 1985 G | D-Function | Question | Solution |
| 476 | 1985 D | Manhattan Circle | Question | Solution |
| 477 | 1985 C | Good Prefixes | Question | Solution |
| 478 | 1986 E | Beautiful Array | Question | Solution |
| 479 | 1986 C | Update Queries | Question | Solution |
| 480 | 1986 A | X Axis | Question | Solution |
| 481 | 1986 B | Matrix Stabilization | Question | Solution |
| 482 | 1986 D | Mathematical Problem | Question | Solution |
| 483 | 1988 B | Make Majority | Question | Solution |
| 484 | 1988 A | Split the Multiset | Question | Solution |
| 485 | 1989 A | Catch the Coin | Question | Solution |
| 486 | 1989 C | Two Movies | Question | Solution |
| 487 | 1989 B | Substring and Subsequence | Question | Solution |
| 488 | 1991 C | Absolute Zero | Question | Solution |
| 489 | 1991 B | AND Reconstruction | Question | Solution |
| 490 | 1991 A | Maximize the Last Element | Question | Solution |
| 491 | 1992 B | Angry Monk | Question | Solution |
| 492 | 1992 C | Gorilla and Permutation | Question | Solution |
| 493 | 1992 A | Only Pluses | Question | Solution |
| 494 | 1993 A | Question Marks | Question | Solution |
| 495 | 1993 B | Parity and Sum | Question | Solution |
| 496 | 1996 D | Fun | Question | Solution |
| 497 | 1996 B | Scale | Question | Solution |
| 498 | 1996 A | Legs | Question | Solution |
| 499 | 1996 C | Sort | Question | Solution |
| 500 | 1997 D | Maximize the Root | Question | Solution |
| 501 | 1997 B | Make Three Regions | Question | Solution |
| 502 | 1997 C | Even Positions | Question | Solution |
| 503 | 1997 A | Strong Password | Question | Solution |
| 504 | 1999 D | Slavic's Exam | Question | Solution |
| 505 | 1999 B | Card Game | Question | Solution |
| 506 | 1999 C | Showering | Question | Solution |
| 507 | 1999 A | A+B Again | Question | Solution |
| 508 | 2000 C | Numeric String Template | Question | Solution |
| 509 | 2000 B | Seating in a Bus | Question | Solution |
| 510 | 2000 A | Primary Task | Question | Solution |
| 511 | 2007 A | Dora's Set | Question | Solution |
| 512 | 2007 B | Index and Maximum Value | Question | Solution |
| 513 | 2007 C | Dora and C++ | Question | Solution |
| 514 | 2008 D | Sakurako's Hobby | Question | Solution |
| 515 | 2008 C | Longest Good Array | Question | Solution |
| 516 | 2008 B | Square or Not | Question | Solution |
| 517 | 2008 A | Sakurako's Exam | Question | Solution |
| 518 | 2009 D | Satyam and Counting | Question | Solution |
| 519 | 2009 A | Minimize! | Question | Solution |
| 520 | 2009 B | osu!mania | Question | Solution |
| 521 | 2009 C | The Legend of Freya the Frog | Question | Solution |
| 522 | 2014 B | Robin Hood and the Major Oak | Question | Solution |
| 523 | 2014 C | Robin Hood in Town | Question | Solution |
| 524 | 2014 A | Robin Helps | Question | Solution |
| 525 | 2020 B | Brightness Begins | Question | Solution |
| 526 | 2020 C | Bitwise Balancing | Question | Solution |
| 527 | 2020 A | Find Minimum Operations | Question | Solution |
| 528 | 2022 A | Bus to Pénjamo | Question | Solution |
| 529 | 2022 B | Kar Salesman | Question | Solution |
| 530 | 2024 A | Profitable Interest Rate | Question | Solution |
| 531 | 2024 C | Concatenation of Arrays | Question | Solution |
| 532 | 2025 A | Two Screens | Question | Solution |
| 533 | 2025 C | New Game | Question | Solution |
| 534 | 2025 B | Binomial Coefficients, Kind Of | Question | Solution |
| 535 | 2026 B | Black Cells | Question | Solution |
| 536 | 2026 C | Action Figures | Question | Solution |
| 537 | 2026 A | Perpendicular Segments | Question | Solution |
| 538 | 2033 A | Sakurako and Kosuke | Question | Solution |
| 539 | 2042 B | Game with Colored Marbles | Question | Solution |
| 540 | 2042 A | Greedy Monocarp | Question | Solution |
| 541 | 2044 C | Hard Problem | Question | Solution |
| 542 | 2044 A | Easy Problem | Question | Solution |
| 543 | 2044 B | Normal Problem | Question | Solution |
| 544 | 2044 G1 | Medium Demon Problem (easy version) | Question | Solution |
| 545 | 2044 E | Insane Problem | Question | Solution |
| 546 | 2044 D | Harder Problem | Question | Solution |
| 547 | 2048 E | Kevin and Bipartite Graph | Question | Solution |
| 548 | 2048 D | Kevin and Competition Memories | Question | Solution |
| 549 | 2053 A | Tender Carpenter | Question | Solution |
| 550 | 2055 B | Crafting | Question | Solution |
| 551 | 2055 A | Two Frogs | Question | Solution |
| 552 | 2056 B | Find the Permutation | Question | Solution |
| 553 | 2056 A | Shape Perimeter | Question | Solution |
| 554 | 2057 A | MEX Table | Question | Solution |
| 555 | 2057 B | Gorilla and the Exam | Question | Solution |
| 556 | 2059 B | Cost of the Array | Question | Solution |
| 557 | 2059 A | Milya and Two Arrays | Question | Solution |
| 558 | 2060 C | Game of Mathletes | Question | Solution |
| 559 | 2060 D | Subtract Min Sort | Question | Solution |
| 560 | 2060 B | Farmer John's Card Game | Question | Solution |
| 561 | 2060 E | Graph Composition | Question | Solution |
| 562 | 2060 A | Fibonacciness | Question | Solution |
| 563 | 2061 A | Kevin and Arithmetic | Question | Solution |
| 564 | 2062 C | Cirno and Operations | Question | Solution |
| 565 | 2062 B | Clockwork | Question | Solution |
| 566 | 2062 A | String | Question | Solution |
| 567 | 2065 C2 | Skibidus and Fanum Tax (hard version) | Question | Solution |
| 568 | 2065 E | Skibidus and Rizz | Question | Solution |
| 569 | 2065 C1 | Skibidus and Fanum Tax (easy version) | Question | Solution |
| 570 | 2065 B | Skibidus and Ohio | Question | Solution |
| 571 | 2065 D | Skibidus and Sigma | Question | Solution |
| 572 | 2065 A | Skibidus and Amog'u | Question | Solution |
| 573 | 2067 C | Devyatkino | Question | Solution |
| 574 | 2067 A | Adjacent Digit Sums | Question | Solution |
| 575 | 2067 B | Two Large Bags | Question | Solution |
| 576 | 2072 B | Having Been a Treasurer in the Past, I Help Goblins Deceive | Question | Solution |
| 577 | 2072 A | New World, New Me, New Array | Question | Solution |
| 578 | 2078 B | Vicious Labyrinth | Question | Solution |
| 579 | 2078 C | Breach of Faith | Question | Solution |
| 580 | 2078 A | Final Verdict | Question | Solution |
| 581 | 2093 G | Shorten the Array | Question | Solution |
| 582 | 2094 G | Chimpanzini Bananini | Question | Solution |
| 583 | 2121 B | Above the Clouds | Question | Solution |
| 584 | 2121 A | Letter Home | Question | Solution |
| 585 | 2134 B | Add 0 or K | Question | Solution |
| 586 | 2134 A | Painting With Two Colors | Question | Solution |
| 587 | 2134 C | Even Larger | Question | Solution |
| 588 | 2136 A | In the Dream | Question | Solution |
| 589 | 2136 B | Like the Bitset | Question | Solution |
| 590 | 2137 D | Replace with Occurrences | Question | Solution |
| 591 | 2137 B | Fun Permutation | Question | Solution |
| 592 | 2137 A | Collatz Conjecture | Question | Solution |
| 593 | 2137 C | Maximum Even Sum | Question | Solution |
| 594 | 2139 C | Cake Assignment | Question | Solution |
| 595 | 2139 A | Maple and Multiplication | Question | Solution |
| 596 | 2139 B | Cake Collection | Question | Solution |
| 597 | 2143 A | All Lengths Subtraction | Question | Solution |
| 598 | 2143 C | Max Tree | Question | Solution |
| 599 | 2143 B | Discounts | Question | Solution |
| 600 | 2144 C | Non-Descending Arrays | Question | Solution |
| 601 | 2144 A | Cut the Array | Question | Solution |
| 602 | 2144 B | Maximum Cost Permutation | Question | Solution |
| 603 | 2148 D | Destruction of the Dandelion Fields | Question | Solution |
| 604 | 2148 A | Sublime Sequence | Question | Solution |
| 605 | 2148 B | Lasers | Question | Solution |
| 606 | 2148 C | Pacer | Question | Solution |
| 607 | 2152 C | Triple Removal | Question | Solution |
| 608 | 2152 B | Catching the Krug | Question | Solution |
| 609 | 2152 A | Increase or Smash | Question | Solution |
| 610 | 2156 C | Maximum GCD on Whiteboard | Question | Solution |
| 611 | 2156 A | Pizza Time | Question | Solution |
| 612 | 2156 B | Strange Machine | Question | Solution |
| 613 | 2158 B | Split | Question | Solution |
| 614 | 2158 A | Suspension | Question | Solution |
| 615 | 2160 A | MEX Partition | Question | Solution |
| 616 | 2160 C | Reverse XOR | Question | Solution |
| 617 | 2160 B | Distinct Elements | Question | Solution |
| 618 | 2163 B | Siga ta Kymata | Question | Solution |
| 619 | 2170 C | Quotient and Remainder | Question | Solution |
| 620 | 2170 A | Maximum Neighborhood | Question | Solution |
| 621 | 2170 B | Addition on a Segment | Question | Solution |
| 622 | 2183 D1 | Tree Coloring (Easy Version) | Question | Solution |
| 623 | 2183 A | Binary Array Game | Question | Solution |
| 624 | 2183 C | War Strategy | Question | Solution |
| 625 | 2184 C | Huge Pile | Question | Solution |
| 626 | 2184 B | Hourglass | Question | Solution |
| 627 | 2184 A | Social Experiment | Question | Solution |
| 628 | 2188 B | Seats | Question | Solution |
| 629 | 2188 A | Divisible Permutation | Question | Solution |
| 630 | 2193 A | DBMB and the Array | Question | Solution |
| 631 | 2193 C | Replace and Sum | Question | Solution |
| 632 | 2193 B | Reverse a Permutation | Question | Solution |
| 633 | 2197 A | Blackslex and Password | Question | Solution |
| 634 | 2197 E | Blackslex and Girls | Question | Solution |
| 635 | 2197 D | Blackslex and Penguin Civilization | Question | Solution |
| 636 | 2197 C | Blackslex and Number Theory | Question | Solution |
| 637 | 2197 B | Blackslex and Showering | Question | Solution |
| 638 | 2200 E | Divisive Battle | Question | Solution |
| 639 | 2200 C | Specialty String | Question | Solution |
| 640 | 2200 B | Deletion Sort | Question | Solution |
| 641 | 2200 D | Portal | Question | Solution |
| 642 | 2200 A | Eating Game | Question | Solution |
| 643 | 2203 B | Beautiful Numbers | Question | Solution |
| 644 | 2203 A | Towers of Boxes | Question | Solution |
| 645 | 2203 D | Divisibility Game | Question | Solution |
| 646 | 2203 C | Test Generator | Question | Solution |
| 647 | 2217 B | Flip the Bit (Easy Version) | Question | Solution |
| 648 | 2250 C | Rank Subsequence | Question | Solution |
| 649 | 2250 A | Threshold Movement | Question | Solution |
| 650 | 2250 B | String Construction | Question | Solution |
I am Shazid Mashrafi.
I am currently studying Computer Science and Engineering & trying to work my way up in the programming world.
Visit my Website and Codeforces account.