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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. int a[100005];
  5. ll w, h, n;
  6. int main()
  7. {
  8.     cin >> w >> h >> n;
  9.  
  10.     ll l = 1, r = 1, ans = 1e18;
  11.  
  12.     while((r / w) * (r / h) < n)
  13.         r *= 2;
  14.  
  15.  
  16.  
  17.     while(l <= r){
  18.         ll mid = (l + r) / 2;
  19.  
  20.         if((mid / w) * (mid / h) >= n){
  21.             ans = mid;
  22.             r = mid - 1;
  23.         }
  24.         else l = mid + 1;
  25.     }
  26.  
  27.     cout << ans;
  28.  
  29.     return 0;
  30. }
Success #stdin #stdout 0s 5328KB
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https://ideone.com/H7HAFE
language:
C++ (gcc 8.3)
created:
20 hours ago
visibility:
public

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