题解

#include<iostream>
#include<cmath>
using namespace std;
int main() {
    int t;
    cin>>t;
    for(int i=0;i<t;i++){
        int a,b;
        cin>>a>>b;
        cout<<min((a+b)/3,min(a,b))<<'\n';
    }
    return 0;
}