#include<bits/stdc++.h> 
using namespace std; 
int main() 
{ 
 int a,b,c; 
 cin>>a>>b>>c; 
 if(a+b>c&&a+c>b&&b+c>a) 
 {
 if(aa+bb==c*c) 
  cout<<"Yes"; else cout<<"No"; 
 } 
 else 
  cout<<"Not a triangle"; 
 return 0; 
}