Submission #1256209

#	Time	Username	Problem	Language	Result	Execution time	Memory
1256209		nanaseyuzuki	Prosjecni (COCI16_prosjecni)	C++20	120 / 120	2 ms	840 KiB

prosjecni

#include <bits/stdc++.h>
/*
    --> Author: Kazuki_Hoshino__8703 <--
    I love Nanasaki Ai ☆*: .｡. o(≧▽≦)o .｡.:*☆
*/
#define fi first
#define se second
#define pii pair<int, int>
#define ll long long
using namespace std;

const int mn = 1e3 + 5, bm = (1 << 15) + 1, mod = 1e9 + 7;
const ll inf = 1e9 + 7, base = 311;

int n, a[mn][mn];

void solve(){
    cin >> n;
    if(n == 2){
        cout << -1 << '\n';
        return;
    }
    for(int i = 1; i <= n - 1; i++){
        a[1][i] = i;
    }
    a[1][n] = n * (n - 1) / 2;
    for(int i = 2; i < n; i++){
        for(int j = 1; j <= n; j++){
            a[i][j] = a[i - 1][j] + n * (n - 1) / 2;
        }
    }
    for(int j = 1; j <= n; j++){
        int total = 0;
        for(int i = 1; i < n; i++) total += a[i][j];
        a[n][j] = n * a[n - 1][j] - total;
    }
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            cout << a[i][j] << ' ';
        }
        cout << '\n';
    }
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    if(fopen("ROBOT.INP", "r")){
        freopen("ROBOT.INP", "r", stdin);
        freopen("ROBOT.OUT", "w", stdout);
    }
    int t = 1;
    // cin >> t;
    while(t --){
        solve();
    }
}

Compilation message (stderr)

prosjecni.cpp: In function 'int main()':
prosjecni.cpp:49:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         freopen("ROBOT.INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
prosjecni.cpp:50:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         freopen("ROBOT.OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 120 / 120