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  1. #include<bits/stdc++.h>
  2. #define ull unsigned long long
  3. #define ll long long
  4. #define all(x) x.begin(), x.end()
  5. using namespace std;
  6. const int maxn = 2e5 + 1;
  7. ll sc12, sc6, sc, x, res = 0, d;
  8. int main() {
  9.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  10.     ll m, n;
  11.     cin >> m >> n;
  12.     d = n - m + 1;
  13.     res += (n - (m / 2) * 2 - 1)/2 + 1;
  14.     sc = d - res;
  15.     ll y = (m + 5) / 6 * 6;
  16.     if(y<=n) sc6 = (n - y) / 6 + 1;
  17.     else sc6 = 0;
  18.     res += (sc - sc6) * 2;
  19.     x = (m + 11) / 12 * 12;
  20.     if (x <= n) sc12 = (n - x) / 12 + 1;
  21.     else sc12 = 0;
  22.     res += sc12 * 2;
  23.     res += (sc6 - sc12) * 3;
  24.     cout << res;
  25.  
  26.  
  27. }
  28.  
  29.  
Success #stdin #stdout 0.01s 5292KB
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72884885429439
https://ideone.com/es7V1Q
language:
C++14 (gcc 8.3)
created:
11 days ago
visibility:
public

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