#include <bits/stdc++.h>

using namespace std;

void fast_io() {
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
}

int main() {
    fast_io();
    string a, p, q;
    cin >> a >> p >> q;
    if (a == "0" || p == q) {
        cout << "No\n";
    } else {
        cout << "Yes\n";
    }
}