//	??´?§?????§???¢ 
#include<iostream>
using namespace std;

int abs(int t) {
	if (t < 0) {
		t = t * -1;
	}
	return t;
}
int main() {
	int a,b,c;
	cin >> a >> b >> c;
	if (a + b > c && a + c > b && b + c > a){
		if ( ((a*a + b*b) == c*c) ||  ((a*a + c*c) == b*b) || ((b*b + c*c) == a*a) ){
			cout << "yes" << endl;
			return 0;
		}
	}
	cout << "no" << endl;
}