#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main()
{
	double v=7,a=0;
    double s,x;
    cin>>s>>x;
    while(s-x>a)
    {
        a+=v;
        v*=0.98;
    }
    if(a+v>s+x)
    cout<<"yes";
    else cout<<"no";
}