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  1. #include <bits/stdc++.h>
  2. // v.erase( unique(all(v)) , v.end() )    ----->   removes duplicates and resizes the vector as so
  3. using namespace std;
  4. #define ll long long
  5. #define lld long double
  6. const lld pi = 3.14159265358979323846;
  7. #define pb push_back
  8. #define pf push_front
  9. #define all(a) a.begin(),a.end()
  10. #define rall(a) a.rbegin(),a.rend()
  11. #define getunique(v) {sort(v.begin(), v.end()); v.erase(unique(v.begin(), v.end()), v.end());}
  12. constexpr int mod = (int)(1e9+7);
  13. #define log(x) (31^__builtin_clz(x)) // Easily calculate log2 on GNU G++ compilers
  14.  
  15. int main()
  16. {ios_base::sync_with_stdio(0),cin.tie(0);
  17. int n,x,y;cin>>n>>x>>y;
  18. if(n==1){
  19.   cout<<min(x,y)<<'\n';return 0;
  20. }
  21. int ans=n*max(x,y);
  22. int en=n*max(x,y);int st=0;
  23. n--;
  24. while(en>=st){
  25.   int mid=en-(en-st)/2;
  26.   if(mid/y+mid/x>=n){
  27.     ans=mid; en=mid-1; continue;
  28.   }
  29.   st=mid+1;
  30. }
  31. cout<<ans+min(x,y)<<'\n';
  32.  
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  37.  
  38.     return 0;
  39. }
  40. /*
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  57.  
  58. */
Success #stdin #stdout 0.01s 5496KB
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-987253588
https://ideone.com/tCOJ57
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

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