#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() using namespace std; int main(){ /* int a; cin>>a; if(a>=60){ cout<<"YES"; }else{ cout<<"NO"; } */ /* int a; cin>>a; cout<<4-a%4; */ /* int a,sum=0,i; cin>>a; for(i=1;i<=5;i++){ sum+=a%10; a=a/10; } cout<<sum; */ /* cout<<123<<endl<<456; */ /* cout<<"hello,lema"; */ /* cout<<(10+20)*8/2; */ /* int a,b,c; cin>>a>>b; c=a+b; cout<<c<<endl; */ /* int a,b; cin>>a>>b; cout<<a/b<<" "<<a%b; */ /* int a; cin>>a; if(a%2==1){ cout<<"Yes"; }else{ cout<<"No"; } */ /* int a,b; cin>>a>>b; if(a>b){ cout<<a; }if(b>a){ cout<<b; } */ int a; cin>>a; if(a>0){ cout<<YES; }if(a<0){ cout<<NO; } return 0; }