#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for (ll i = a; i < b; i++)
using ll = long long;

int main(){
    int n, h, w;
    cin >> n >> h >> w;
    string ans = "No";
    if(h == 1 || w == 1 || h == w) ans = "Yes";
    cout << ans << endl;
}