Submission #1252593

#	Time	Username	Problem	Language	Result	Execution time	Memory
1252593		bzzzzzzzzzz	World Map (IOI25_worldmap)	C++20	Compilation error	0 ms	0 KiB

worldmap

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

const int SIZE = 41;

vector<int> o;
vector<int> used(SIZE, 0);
vector<vector<int>> g(SIZE);

void dfs(int v) {
    o.push_back(v);
    used[v] = 1;
    for (auto i : g[v]) {
        if (used[i] == 0) {
            dfs(i);
            o.push_back(v);
        }
    }
}

std::vector<std::vector<int>> create_map(int N, int M, std::vector<int> A, std::vector<int> B) {
      for (int i = 0; i < M; i++) {
            g[A[i]].push_back(B[i]);
            g[B[i]].push_back(A[i]);
        }
        int n = (int)2 * (N - 1) + 1;
        vector<vector<int>> ans(n, vector<int> (n, 0));
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                if (i < N) {
                    ans[i][j] = i + 1;
                } else {
                    ans[i][j] = 2 * N - i - 1;
                }
            }
        }
        return ans;
}

int main() {
    vector<int> A = {1, 2};
    vector<int> B = {2, 3};
    vector<vector<int>> c = create_map((int)A.size() + 1, (int)A.size(), A, B);
    for (auto i : c) {
        for (auto j : i) {
            cout << j;
        }
        cout << '\n';
    }
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccf3qVqy.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cciTnCkb.o:worldmap.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status