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30 changes: 30 additions & 0 deletions find-the-missing-number
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Original file line number Diff line number Diff line change
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#include <stdio.h>

void findMissing(int arr[], int N)
{
int temp[N + 1];
for (int i = 0; i <= N; i++) {
temp[i] = 0;
}

for (int i = 0; i < N; i++) {
temp[arr[i] - 1] = 1;
}

int ans;
for (int i = 0; i <= N; i++) {
if (temp[i] == 0)
ans = i + 1;
}
printf("%d", ans);
}

/* Driver code */
int main()
{
int arr[] = { 1, 3, 7, 5, 6, 2 };
int n = sizeof(arr) / sizeof(arr[0]);
findMissing(arr, n);
}

// This code is contributed by nikhilm2302