CF 4A Watermelon

~~~題目鏈接~~~

code：

#include <iostream>
using namespace std;
int main()
{
    int i = 0, j = 0, w = 0, flag = 0;
    while(cin>>w)
    {
        flag = 0;
        for(i = 2; i<=w/2 && flag == 0; i += 2)
        {
            if((w-i)%2 == 0) flag = 1;
        }
        if(flag) cout<<"YES"<<endl;
        else cout<<"NO"<<endl;
    }
    return 0;
}