#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int n,a[101][101],s=0,c=0; for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++){ cin>>a[i][j]; if(a[i][j]==a[i][1]){ s++; } if(s%2==0) c++; }s=0;} if(c==n) cout<<"OK"; else cout<<"Corrupt"; return 0; }