#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main()
{
// k = exp / cost;
int l, r, x, y, k;
bool ans = 0;
cin >> l >> r >> x >> y >> k;
for (int i = x; i <= y; i++)
{
if (l <= i * k && i * k <= r)
{
ans = 1;
}
}
if (ans)
{
cout << "YES";
}
else
{
cout << "NO";
}
return 0;
}
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