#include<iostream>
#include<algorithm>
using namespace std;

int main()
{
	int x;
	int a[3];

	cin >> x;

	for (int i = 0; i < 3; i++) {
	cin>>a[i];
	}
	sort(a, a + 3);
	if ((a[1] * a[1]) + (a[0] * a[0]) == (a[2] * a[2])) {
		cout << "YES" << endl;
	}
	else {
		cout << "NO" << endl;
	}
	return 0;
}