#include <iostream>
#include <cmath>
using namespace std;

int f(unsigned int a, unsigned int m){
	int n = 0;
	if(m - 2*a != 0){
        n ++;
        f(a+1, m - a); 
	}
	else{
		n ++;
        return n;
	}
}
int main() {
	int n, a, m;
	cin>>a>>m;
	cout<<f(a, m);
	return 0;
}