1 #include<cstdio>
 2 #include<iostream>
 3 
 4 using namespace std;
 5 
 6 int main()
 7 
 8 {
 9     double a, b;
10     cin >> a >> b;
11     double maxn = max(a,b);//取最大值 
12     double minn = min(a,b);//取最小值 
13     if(maxn-minn <= 1e-8) cout<<"yes"<<endl;//判断误差 
14     else cout<<"no"<<endl;
15     return 0;
16 
17 }