Code bài 1 bằng C++ cực chill

#include<bits/stdc++.h>
#define endl '\n'
using namespace std;

int n;

int diff(int x, int y) {
    int diff = x ^ y;
    int base = 1;
    for (int i = 1; i <= n; i++, base <<= 1)
        if (base == diff)
            return i;
    return 0;
}

void solve(){
    cin >> n;
    for (int i = 0; i < n*n; i++) {
        for (int j = 0; j < n*n; j++) {
            cout << diff(i, j) << " ";
        }
        cout << endl;
    }
}

void fastIO(){
    ios_base::sync_with_stdio(false); //cin.tie(0); cout.tie(0);
}

int main(){
    fastIO();
    int t = 1; //cin >> t;
    while(t--) solve();
    return 0;
}