题解

#include<bits/stdc++.h>
#define ll long long                                                        //防伪标识
#define MAXN 1005
#define maxn 10005
#define MAXM 10000
#define maxm 1000005
#define Y1 "YES"
#define N1 "NO"
#define Y2 "yes"
#define N2 "no"
#define Y3 "Yes"
#define N3 "No"
using namespace std;
int a;
int main(){
	cin>>a;
	if(a>0) cout<<Y1;
	else cout<<N1;
	return 0;
}