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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     ios::sync_with_stdio(false);
  6.     cin.tie(nullptr);
  7.  
  8.     // freopen("input.txt", "r", stdin);
  9.     // freopen("output.txt", "w", stdout);
  10.  
  11.     int n, res = 0;
  12.     cin >> n;
  13.  
  14.     while (n > 0) {
  15.         if (n % 10 == 0 || n % 10 == 5) {
  16.             res++;
  17.         } 
  18.  
  19.         n -= 7;
  20.     }
  21.  
  22.     cout << res;
  23.  
  24.     return 0;
  25. }
Success #stdin #stdout 0.04s 5308KB
comments (?)
stdin
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100000000
stdout
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2857143
https://ideone.com/wnxBNB
language:
C++ (gcc 8.3)
created:
10 hours ago
visibility:
public

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