AC

#include <bits/stdc++.h>
using namespace std;
int main() {
	int v,h,a;
	int b=1,c=0;
	cin>>v>>h;
	while(h>0&&v>0){
		for(int i=b;i>0&&h>0;i--){
			v-=h;
			c++;
			if(v<=0){
				break;
			}
		}
		h=h/2;
		b++;
    }
	if(v<=0){
		cout<<c;
	}else{
		cout<<v;
	}
	return 0;
}