Submission #582819

#	Time	Username	Problem	Language	Result	Execution time	Memory
582819		LucaIlie	Stations (IOI20_stations)	C++17	Compilation error	0 ms	0 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>

#define MAX_N 1000

using namespace std;

int l;
vector<int> edges[MAX_N];
vector<int> labels;

void dfs( int u, int p, int d ) {
    if ( d == 0 )
        labels[u] = l * 2;
    l++;
    for ( int v: edges[u] ) {
        if ( v != p )
            dfs( v, u, 1 - d );
    }
    if ( d == 1 )
        labels[u] = l * 2 + 1;
    if ( edges[u].size() > 1 )
        l++;
}

vector<int> label( int n, int k, vector<int> u, vector<int> v ) {

    for ( int i = 0; i < n - 1; i++ ) {
        edges[u[i]].push_back( v[i] );
        edges[v[i]].push_back( u[i] );
    }

    labels.resize( n );
    l = 0;
    dfs( 0, -1, 0 );

    return labels;
}

int find_next_station( int s, int t, vector<int> c ) {
    int l, r, d, i;

    return c[0];
}

int main() {
    vector <int> lab = label(5, 10, {0, 1, 1, 2}, {1, 2, 3, 4});
    cout << "labels ";
    for ( auto x: lab )
        cout << x << " ";
    cout << "\n";
    cout << find_next_station(4, 10, {9, 13}) << "\n";
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:41:9: warning: unused variable 'l' [-Wunused-variable]
   41 |     int l, r, d, i;
      |         ^
stations.cpp:41:12: warning: unused variable 'r' [-Wunused-variable]
   41 |     int l, r, d, i;
      |            ^
stations.cpp:41:15: warning: unused variable 'd' [-Wunused-variable]
   41 |     int l, r, d, i;
      |               ^
stations.cpp:41:18: warning: unused variable 'i' [-Wunused-variable]
   41 |     int l, r, d, i;
      |                  ^
/usr/bin/ld: /tmp/ccpKtEl8.o: in function `main':
stub.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc5GEF43.o:stations.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status