#include <bits/stdc++.h>
using namespace std;
int n, m, maxi, mini, deter = 2, tim[105];
int main() {
  cin >> n >> m >> mini >> maxi;
  for (int i = 0; i < m; i++) {
    cin >> tim[i];
    if (tim[i] == maxi) deter--;
    if (tim[i] == mini) deter--;
  }
  sort(tim, tim + m);
  if (tim[0] < mini || tim[m - 1] > maxi || n - m < deter) {
    cout << "Incorrect" << endl;
    return 0;
  }
  cout << "Correct" << endl;
  return 0;
}
