题解 100% AC

#include <bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c;cin>>a>>b>>c;
    if(a==1&&b==2)cout<<"YES";
    else if(a==1&&c==3) cout<<"YES";
    else if(b==2&&c==3) cout<<"YES";
    else cout<<"NO";
	return 0;
}