Ruudukko

#include <bits/stdc++.h>

using namespace std;

int n;

int main(){
    cin>>n;

    for(int i=0; i<n; i++){
        for(int j=0; j<n; j++){
            cout<<(i^j)+1<<" ";
        }
        cout<<"\n";
    }


    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED