Submission #1294592

#	Time	Username	Problem	Language	Result	Execution time	Memory
1294592		theiulius	World Map (IOI25_worldmap)	C++20	Compilation error	0 ms	0 KiB

worldmap

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ff first
#define ss second
#define pb push_back
#define endl "\n"
int n, m, x, y;

main(){
    /*ifstream cin(".in");
    ofstream cout(".out");*/
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    cin >> n >> m;
    for (int i = 0; i < m; i++){
        cin >> x >> y;
    }
    
    for (int i = 0; i < n; i++){
        for (int j = 0; j < n; j++){
            cout << (i + j) % n + 1 << " ";
        }
        cout << endl;
    }
}

Compilation message (stderr)

worldmap.cpp:10:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   10 | main(){
      | ^~~~
/usr/bin/ld: /tmp/ccYAYhR8.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccZYXO9W.o:worldmap.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccYAYhR8.o: in function `main':
grader.cpp:(.text.startup+0x5f3): undefined reference to `create_map(int, int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status