杭电2175

#include<stdio.h>
int cus(int x,long long y)
{
    long long temp = (long long)1<<(x-1);
    if(y == temp)
        return x;
    else if(y > temp)
        y-=temp;
    cus(x-1,y);
}
int main()
{
    int a;
    long long b;
    while(~scanf("%d%lld",&a,&b) && a+b)
        printf("%d\n",cus(a,b));
}