#include<bits/stdc++.h>

 using namespace std;

 int main() {

     long long l,r,x,y;

     long long  k;

     while(~scanf("%lld %lld %lld %lld %lld",&l,&r,&x,&y,&k)) {

         int flag = ;

         for(int i = x;  i <= y; i++) {

             if(  l <= i*k && i*k <= r ) {

                 flag = ;

                 break;

             }

         }

         if(flag)

             cout<<"YES"<<endl;

         else

             cout<<"NO"<<endl;

     }

     return ;

 }