题解 | x_to_y_2

#include <iostream>
using namespace std;

int main() {
    int t;
    cin>>t;
    long long x,y,ans;
    while(t--){
        cin>>x>>y;
        ans=0;
        while((x|y)!=y){
            x>>=1;
            ans++;
        }
        cout<<(x==y?ans:ans+1)<<"\n";
    }
}