trangle

#include<iostream>
#include<algorithm>
using namespace std;
int main()
{
	int a,b,c;
	while(cin>>a>>b>>c)
	{
		int temp;
		if(a>b){
			temp=a;
			a=b;
			b=temp;
		}
		if(a>c){
			temp=a;
			a=c;
			c=temp;
		}
		if(b>c){
			temp=b;
			b=c;
			c=temp;
		}
		if(a+b<=c){
			cout<<"not a trangle"<<endl;
		}else{
			if(a*a+b*b==c*c){
				cout<<"Yes"<<endl;
			}else{
				cout<<"No"<<endl;
			}
		}
	}
	return 0;
}