#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,x,y;
cin >> n >> x >> y;
if( (n/2 > x or x > n/2+1) or (y < n/2 or y > n/2+1)){
cout << "YES\n";
} else cout <<"NO\n";
} 1302. Deepest Leaves Sum | 1209. Remove All Adjacent Duplicates in String II |
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946. Validate Stack Sequences | 921. Minimum Add to Make Parentheses Valid |
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