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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long double lb;
  4. typedef long double ll;
  5. lb a, A, B, x, y;
  6. int t;
  7.  
  8.  
  9. int main(){
  10.     ios_base::sync_with_stdio(0);
  11.     cout.tie(0);
  12.     cin.tie(0);
  13.     cin >> t;
  14.     while(t--){
  15.         cin >> x >> y >> a;
  16.         a += 0.5;
  17.         string ans = "";
  18.         long long L = 1, R = 1e9;
  19.         bool printed = false;
  20.         if(x >= a){
  21.             cout << "NO" << endl;
  22.             continue;
  23.         }
  24.         while(L <= R){
  25.             ll mid = (L + R) / 2;
  26.             A = mid * x + mid * y;
  27.             B = (mid + 1) * x + mid * y;
  28.             if(A >= a and B < a){
  29.                 cout << "YES" << endl;
  30.                 printed = true;
  31.                 break;
  32.             }
  33.             if(B >= a and A < a){
  34.                 cout << "NO" << endl;
  35.                 printed = true;
  36.                 break;
  37.             }
  38.             if(A < a and B < a) L = mid + 1;
  39.             if(A > a and B > a){
  40.                 R = mid - 1;
  41.                 ans = "YES";
  42.             }
  43.         }
  44.         if(ans.size() and !printed) cout << ans << endl;
  45.     }
  46. }
Success #stdin #stdout 0s 5280KB
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https://ideone.com/STkYo9
language:
C++14 (gcc 8.3)
created:
19 days ago
visibility:
public

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