#include <bits/stdc++.h>
using namespace std;
#define ll long long int

int main()
{
    ll l, r, x, y, k;
    while(cin >> l >> r >> x >> y >> k)
    {
        for(ll i = x; i <= y; i++)
        {
            if(k * i >= l && k * i <= r)
            {
                cout << "YES\n";
                return 0;
            }
        }
        cout << "NO\n";
    }
}