Submission #979306

#	Time	Username	Problem	Language	Result	Execution time	Memory
979306		Zicrus	Stations (IOI20_stations)	C++17	Compilation error	0 ms	0 KiB

stations

#include <bits/stdc++.h>
#include "stations.h"
using namespace std;

vector<int> lbl;
vector<vector<int>> adj;

void DFS(int index, int last, int id)
{
    lbl[index] = id;
    for (auto node : adj[index])
    {
        if (node == last) continue;
        DFS(node, index, id + 1);
    }
}

vector<int> label(int N, int K, vector<int> U, vector<int> V)
{
    adj = vector<vector<int>>(n);
    lbl = vector<int>(n);

    for (int i = 0; i < N - 1; i++)
    {
        adj[U[i]].push_back(V[i]);
        adj[V[i]].push_back(U[i]);
    }

    for (int i = 0; i < N; i++)
    {
        if (adj[i].size() == 1)
        {
            DFS(i, -1, 0);
            break;
        }
    }
    return lbl;
}

int find_next_station(int S, int T, vector<int> C)
{
    if (T > S)
    {
        return S + 1;
    }

    return S - 1;
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:20:31: error: 'n' was not declared in this scope
   20 |     adj = vector<vector<int>>(n);
      |                               ^