#include <bits/stdc++.h>
using namespace std;
const int N = 5e5 + 100;
int read() {
  int x = 0;
  char ch = getchar();
  while ('0' > ch || ch > '9') ch = getchar();
  while ('0' <= ch && ch <= '9') {
    x = (x << 3) + (x << 1) + ch - '0';
    ch = getchar();
  }
  return x;
}
int l, r, x, y;
double k;
int main() {
  cin >> l >> r >> x >> y >> k;
  for (int i = x; i <= y; i++) {
    double lx = l * 1.0 / i;
    double lr = r * 1.0 / i;
    if (lx <= k && lr >= k) {
      puts("YES");
      return 0;
    }
  }
  puts("NO");
}
