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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 , ll a,ll b){
  9.         if(mid<=a && mid<=b && mid<=(a+b)/3) return true;
  10.         return false;
  11.     }
  12.  
  13.     void solve() {
  14.        ll a,b;
  15.        cin >> a >> b;
  16.        ll l=0,r=1e12,ans=0;
  17.        while(l<=r){
  18.          ll mid = (l+r)/2;
  19.          if(f(mid,a,b)){
  20.             ans=mid;
  21.             l=mid+1;
  22.          }
  23.          else r=mid-1;
  24.        }
  25.        cout << ans << '\n';
  26.     }
  27. int main(){ 
  28.     ios::sync_with_stdio(false);
  29.     cin.tie(nullptr);
  30.  
  31.     int t;
  32.     cin >> t;
  33.     while (t--) solve();
  34.  
  35.     return 0;
  36. }
Success #stdin #stdout 0.01s 5272KB
comments (?)
stdin
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4
4 4
1000000000 0
7 15
8 7
stdout
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2
0
7
5
https://ideone.com/bqeruV
language:
C++ (gcc 8.3)
created:
9 days ago
visibility:
public

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