#include<iostream> using namespace std; int n1,n2=1,n3,n4; int main (){ cin>>n1; if(n1==2){ cout<<"Yes"; return 0; }else if(n1 ==1){ cout<<"Yes"; return 0; } n4 = n1; while(n4){ if(n1%n2 == 0){ n3++; } n4--; n2++; } if(n3 == 2){ cout<<"Yes"; }else{ cout<<"No"; } return 0; }