Ratsun reitit

#include <bits/stdc++.h>

typedef long long ll;

#define M 1000000007

using namespace std;

int calc(double i, double j) {
    return ceil(max(max(i / 2, j / 2), (i+j)/3));
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	int n;
	cin >> n;

    if (n == 4) {
        cout << "0 3 2 5\n3 4 1 2\n2 1 4 3\n5 2 3 2";
        return 0;
    }

	for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            if (i == j && i == 0) cout << "0 ";
            else if (i + j == 1) cout << "3 ";
            else if (i == j && i < 3) cout << "4 ";
            else {
                cout << calc(i, j) + (calc(i,j) + i + j) % 2 << " ";
            }
        }
        cout << "\n";
	}

	return 0;
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED

Test 6

Group: 1, 2, 3

Verdict: ACCEPTED

Test 7

Group: 1, 2, 3

Verdict: ACCEPTED

Test 8

Group: 2, 3

Verdict: ACCEPTED

Test 9

Group: 2, 3

Verdict: ACCEPTED

Test 10

Group: 2, 3

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED