#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int main() {
    int N, h, w;
    cin >> N >> h >> w;
    if(h == 1 || w == 1){
        cout << "Yes" << endl;
        return 0;
    }
    else if(h == w){
        cout << "Yes" << endl;
        return 0;
    }else cout << "No" << endl;
    return 0;
}