#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],s1=0,s2=0,j; cin>>n; for(int i=1;i<=n;i++){ for(j=1;j<=n;j++){ cin>>a[i][j]; } } for(int i=1;i<=n;i++){ for(j=1;j<=n;j++){ if(a[i][j]==1) s1++; } if(a[i][j]==1) s2++; } if(s1%2==0 && s2%2==0) cout<<"OK"; else cout<<"Corrupt"; return 0; }