Submission #242551

#	Time	Username	Problem	Language	Result	Execution time	Memory
242551		NONAME	Prosjecni (COCI16_prosjecni)	C++14	24 / 120	5 ms	512 KiB

prosjecni

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;

ll a[101][101];

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    ll n;
    cin >> n;
    if (n == 2) {
        cout << "-1\n";
        return 0;
    }
    ll sum = n * (n - 1) / 2;
    for (int i = 0; i < n - 1; ++i)
        a[0][i] = i + 1;
    a[0][n - 1] = sum;

    if (n & 1) {
        ll cur = 1;
        for (int i = 0; i < n; ++i)
        for (int j = 0; j < n; ++j)
            a[i][j] = cur++;
    } else {
        for (int i = 1; i < n - 1; ++i)
        for (int j = 0; j < n; ++j)
            a[i][j] = a[i - 1][j] + sum;

        for (int j = 0; j < n; ++j) {
            ll cur = 0;

            for (int i = 0; i < n - 1; ++i)
                cur += a[i][j];

            if (cur % n == 0) {
                a[n - 1][j] = cur;
                continue;
            }

            ll need = n - (cur % n);

            cur = (cur - (cur % n)) + need;
            a[n - 1][j] = cur;
        }
    }

    //set <ll> s;

    //for (int i = 0; i < n; ++i)
    //for (int j = 0; j < n; ++j)
        //s.insert(a[i][j]);

    //if (int(s.size()) != n * n) {
        //cout << "-1\n";
        //return 0;
    //}

    for (int i = 0; i < n; ++i, cout << "\n")
    for (int j = 0; j < n; ++j)
        cout << a[i][j] << " ";
}

• Subtask 1: 24 / 120