#include<bits/stdc++.h>
using namespace std;
int main(){
    long long n,m;
    cin>>n>>m;
    long long sum;
    for(long long i=1;;i++){
        if(pow(2,i)>m){
            sum=i-1;
            break;
        }
    }
    cout<<sum;
	return 0;
}

https://www.luogu.com.cn/record/226856907