#include using namespace std; int main() { int a, b, c; cin >> a >> b >> c; bool ans = false; for (int x = 1; x < b + c; x++) { for (int y = 1; y < b + c; y++) { if (b + c > a + x + y && a + x + y + min(b, c) > max(b, c)) { if (b * (b * y * a + b * y * y + c * x * y) == c * (c * x * a + c * x * x + b * x * y)) { ans = true; } } } } cout << (ans ? "Yes" : "No") << endl; return 0; }