#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a; cin>>a; switch(!=(a==1)||(a==3)||(a==5)){ case 1:cout<<"YES"<<endl;break; default:cout<<"NO";break; } return 0; }