#include <iostream>
#include <vector>

int main() {
    std::vector<int> xy(5);
    for (int &x : xy) std::cin >> x;

    if (xy.at(1) == xy.at(3)) {
        std::cout << "Yes" << std::endl;
    } else {
        std::cout << "No" << std::endl;
    }
}