fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int long long int
  4. #define all(v) v.begin(), v.end()
  5.  
  6. int fun(int t, int x, int y)
  7. {
  8.     int cnt = 0;
  9.     cnt = (t / x) + (t / y);
  10.     return cnt;
  11. }
  12.  
  13. signed main()
  14. {
  15.  
  16.     int n, i, x, y, ans = 0, cnt = 0, m;
  17.  
  18.     cin >> n >> x >> y;
  19.  
  20.     ans = min(x, y);
  21.     n--;
  22.  
  23.     int l = 0;
  24.     int r = 1e18;
  25.  
  26.     while (l <= r)
  27.     {
  28.  
  29.         int m = l + (r - l) / 2;
  30.         cnt = fun(m, x, y);
  31.  
  32.         if (cnt < n)
  33.             l = m + 1;
  34.         else
  35.             r = m - 1;
  36.     }
  37.  
  38.     cout << ans + l << endl;
  39. }
Success #stdin #stdout 0s 5552KB
comments (?)
stdin
copy 
4 1 1
stdout
copy 
3
https://ideone.com/BzyeMX
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!