题解 | x_to_y_2

#include <iostream>
#define ll long long
using namespace std;
 
int main() {
    int t;
    cin>>t;
    while(t--){
        ll x,y,ans=0;
        cin>>x>>y;
        while((x|y)!=y){
            x>>=1;
            ans++;
        }
        cout<< ((x==y) ? ans : ans+1) << endl;
    }
}