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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. const int Mod=1e9+7;
  5. const ll INF = 10000000000000;
  6. const int N = 1e6+7;
  7.  
  8.   bool f(ll mid , int a ,int b){
  9.     if((a>=2*mid && b>=mid) || (b>=2*mid && a>=mid)) return true;
  10.     return false;
  11.     }
  12.  
  13.     void solve() {
  14.         ll a,b;
  15.         cin >> a >> b;
  16.         ll l=0,r=1e10;
  17.         ll ans=0;
  18.         while(l<=r){
  19.            ll mid=(l+r)/2;
  20.            if(f(mid,a,b)){
  21.             ans=mid;
  22.             l=mid+1;
  23.            } 
  24.            else r=mid-1;
  25.         }
  26.         cout << ans << '\n';
  27.     }
  28.  
  29. int main(){ 
  30.     ios::sync_with_stdio(false);
  31.     cin.tie(nullptr);
  32.  
  33.     int t;
  34.     cin >> t;
  35.     while (t--) solve();
  36.  
  37.     return 0;
  38. }
  39.  
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin 
4
4 4
1000000000 0
7 15
8 7
stdout 
2
0
7
4
https://ideone.com/oVfSzT
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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