Submission #1310932

#	Time	Username	Problem	Language	Result	Execution time	Memory
1310932		altayeb_132	Stations (IOI20_stations)	C++20	Compilation error	0 ms	0 KiB

stations

#include<bits/stdc++.h>
using namespace std;
int indg[1001], ans[1001];
vector<int> adj[1001];
int t1 = 0;
void dfs(int n, int pr)
{
    ans[n] = t1++;
    for(auto i : adj[n])
        if(i != pr)
            dfs(i, n);
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) 
{
    vector<int> labels(n);
    for(int i = 0; i < n - 1; i++)
    {
        adj[u[i]].push_back(v[i]);
        adj[v[i]].push_back(u[i]);
        indg[v[i]]++;
        indg[u[i]]++;
    }
    for(int i = 0; i < n; i++)
    {
        if(indg[i] == 1)
        {
            dfs(i, -1);
            break;
        }
    }
    for (int i = 0; i < n; i++) 
    {
        labels[i] = ans[i];
    }
    return labels;
}

int find_next_station(int s, int t, std::vector<int> c) 
{
    if(c.size() == 1)
        return c[0];
    if(s < t)
        return max(c[0], c[1]);
    else
        return min(c[0], c[1]);
}
int main() 
{
    int n, k;
    cin >> n >> k;
    vector<int> u1(n - 1), v1(n - 1);
    for(int i = 0; i < n - 1; i++)
    {
        int u, v;
        cin >> u >> v;
        u1[i] = u; v1[i] = v;
    }
    label(n, k, u1, v1);
    // cout << 1;
    // for(int i = 0; i < n; i++)
    //     cout << ans[i] << ' ';
    cout << find_next_station(3, 1, {0, 2});
}

Compilation message (stderr)

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