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  1. #include <stdio.h>
  2.  
  3. int main()
  4. {
  5.     unsigned n, i;
  6.     long long s = 0;
  7.  
  8.     scanf("%u", &n);
  9.     for (i = 0; i < n; i++)
  10.     {
  11.         s += i * i;
  12.     }
  13.     printf("%I64d\n", s);
  14.  
  15.     return 0;
  16. }
Success #stdin #stdout 0s 2252KB
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https://ideone.com/ZEAzN3
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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