#include #include using namespace std;

int main() { int a, b, c; cin >> a >> b >> c;

if (a + b <= c || a + c <= b || b + c <= a) {
    cout << "no" << endl;
    return 0;
}

int maxSide = max(a, max(b, c));
int sum = a * a + b * b + c * c - maxSide * maxSide;
if (sum == maxSide * maxSide) {
    cout << "yes" << endl;
} else {
    cout << "no" << endl;
}

return 0;

}