2137a.cpp

#include <bits/stdc++.h>
using namespace std;

int main() {
    int t;
    cin >> t;
    while (t--) {
        int k,x;
        cin >> k >> x;

        for(int i = 0;i<k;i++){
            x = x*2;
        }

        cout << x << "\n";
    }
    return 0;
}