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  1. #include <iostream>
  2. using namespace std;
  3. int main()
  4. {
  5.     int n,x,y;
  6.     cin>>n>>x>>y;
  7.     long long l =1,r=1e18,ans=1e18;
  8.     while (l<=r){
  9.         long long mid =(l+r)/2;
  10.         long long pc = mid/x + mid/y;
  11.         if(pc>=n){
  12.         ans = mid;
  13.         r=mid-1;}
  14.         else 
  15.         l=mid+1;}
  16.  
  17.         cout<<ans;
  18.  
  19.  
  20.  
  21.     return 0;
  22. }
Success #stdin #stdout 0s 5332KB
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720414832
https://ideone.com/YO2wSi
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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