#include <bits/stdc++.h>
using namespace std;
long long a[100009];
int main() {
  long long n, m, mn, mx;
  cin >> n >> m >> mn >> mx;
  for (int i = 0; i < m; i++) {
    cin >> a[i];
  }
  long long mnn = *min_element(a, a + m);
  long long mxx = *max_element(a, a + m);
  if (mnn < mn || mxx > mx) {
    cout << "Incorrect" << endl;
    return 0;
  }
  if ((mn != mnn) + (mx != mxx) > n - m) {
    cout << "Incorrect" << endl;
    return 0;
  }
  cout << "Correct" << endl;
  return 0;
}
