#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define all(x) x.begin(), x.end()

void solve(){
	int n, k;
	cin >> n >> k;
	ll an = k / 2;
	cout << an << '\n';
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
    cin >> t;
    while(t--){
    	solve();
    }
}