#include <bits/stdc++.h>
using namespace std;
template <class T, class COMPARATOR>
ostream& operator<<(ostream& os, priority_queue<T, vector<T>, COMPARATOR> V) {
  os << "[ ";
  while (V.size() > 0) {
    os << V.top() << " ";
    V.pop();
  }
  return os << "]";
}
template <class T>
ostream& operator<<(ostream& os, priority_queue<T> V) {
  os << "[ ";
  while (V.size() > 0) {
    os << V.top() << " ";
    V.pop();
  }
  return os << "]";
}
template <class T>
ostream& operator<<(ostream& os, vector<T> V) {
  os << "[ ";
  for (auto v : V) os << v << " ";
  return os << "]";
}
template <class T>
ostream& operator<<(ostream& os, set<T> V) {
  os << "[ ";
  for (auto v : V) os << v << " ";
  return os << "]";
}
template <class T, class R>
ostream& operator<<(ostream& os, map<T, R> V) {
  os << "[ ";
  for (auto v : V) os << "(" << v.first << ":" << v.second << ")";
  return os << "]";
}
template <class T, class R>
ostream& operator<<(ostream& os, pair<T, R> V) {
  return os << "(" << V.first << "," << V.second << ")";
}
template <typename Arg1>
void __f(const char* name, Arg1&& arg1) {
  cout << "T->";
  cout << name << " : " << arg1 << endl;
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args) {
  cout << "T->";
  const char* comma = strchr(names + 1, ',');
  cout.write(names, comma - names) << " : " << arg1 << " | ";
  __f(comma + 1, args...);
}
clock_t clk = clock();
const long long MOD = 1000 * 1000 * 1000 + 7;
const long long MOD1 = 998244353;
void solve() {
  double l, r, x, y, k;
  cin >> l >> r >> x >> y >> k;
  while (l <= r && x <= y) {
    double p = l / x;
    if (p == k) {
      cout << "YES" << endl;
      return;
    } else if (p < k) {
      l++;
    } else {
      x++;
    }
  }
  cout << "NO" << endl;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  cout << fixed << setprecision(25);
  solve();
  return 0;
}
