#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 year; cin>>year; if(year%4==0 && year%100!=0 || year%400==0){ cout<<"yes"; } else{ cout<<"no"; } return 0; }