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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main(){
  5.     ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
  6.     long long a,b; cin >> a >> b;
  7.     cout << b/3 - (a - 1)/ 3;       
  8.       return 0;
  9. }
Success #stdin #stdout 0s 5284KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/nDrVoo
đếm số chia hết cho 3 từ a đến b
language:
C++14 (clang 8.0)
created:
7 days ago
visibility:
public

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