Submission #1284667

#	Time	Username	Problem	Language	Result	Execution time	Memory
1284667		axoryn	World Map (IOI25_worldmap)	C++20	Compilation error	0 ms	0 KiB

worldmap

#include <bits/stdc++.h>
using namespace std;
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int T;
    if(!(cin>>T)) return 0;
    while(T--){
        int N,M;
        cin>>N>>M;
        vector<vector<int>> adj(N, vector<int>(N,0));
        for(int i=0;i<M;i++){
            int a,b;cin>>a>>b;--a;--b;
            adj[a][b]=adj[b][a]=1;
        }
        int K=2*max(1,N);
        cout<<K<<"\n";
        for(int i=0;i<K;i++){
            for(int j=0;j<K;j++){
                if(j) cout<<" ";
                cout<<K;
            }
            cout<<"\n";
        }
        for(int i=0;i<N;i++){
            vector<int> row;
            for(int j=0;j<N;j++){
                row.push_back(i+1);
                if(i==j) row.push_back(i+1);
                else row.push_back(adj[i][j]? j+1 : i+1);
            }
            for(int rep=0;rep<2;rep++){
                for(int c=0;c<K;c++){
                    if(c) cout<<" ";
                    cout<<row[c];
                }
                cout<<"\n";
            }
        }
    }
    return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccim4t6G.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccWVQIjL.o:worldmap.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccim4t6G.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