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  1. #include <iostream>
  2. using namespace std;
  3. int main()
  4. {
  5.     ios_base::sync_with_stdio(0);
  6.     cin.tie(0);
  7.     int a, b, k;
  8.     cin >> a >> b >> k;
  9.     int c = 0;
  10.     if(a != 0 && b - a >= k){c++;}
  11.     cout << ((b - a) / k) + 1 - c;
  12.     return 0;
  13. }
Success #stdin #stdout 0s 5324KB
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2 11 10
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1
https://ideone.com/SgX0iv
language:
C++ (gcc 8.3)
created:
3 hours ago
visibility:
public

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