#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m, mn, mx;
  int cmn = 111, cmx = -1;
  scanf("%d %d %d %d", &n, &m, &mn, &mx);
  bool mnok = 0, mxok = 0;
  for (int i = 0; i < m; ++i) {
    int t;
    scanf("%d", &t);
    mnok |= t == mn;
    mxok |= t == mx;
    if (cmn > t) cmn = t;
    if (cmx < t) cmx = t;
  }
  if (mn > cmn || mx < cmx || n - m < !mnok + !mxok)
    puts("Incorrect");
  else
    puts("Correct");
  return 0;
}
