Submission #1217644

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217644		cpdreamer	Stations (IOI20_stations)	C++20	Compilation error	0 ms	0 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
const long long INF = 1e17;
typedef long long ll;
const ll MOD = (ll)1e9+7;
#define P pair
#define S second
#define F first
#define pb push_back
#define V vector
#define all(v) v.begin(), v.end()
V<int>adj[(int)1000];
V<P<int,int>>vp(1000);
int dep[1000];
int cnt=0;
void dfs(int n,int p) {
    vp[n].F=cnt;
    for (auto u:adj[n]) {
        if(u==p)continue;
        cnt++;
        dep[u]=dep[n]+1;
        dfs(u,n);
    }
    cnt++;
    vp[n].S=cnt;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    cnt=0;
    dep[0]=0;
    for (int i=0;i<n-1;i++) {
        adj[u[i]].pb(v[i]);
        adj[v[i]].pb(u[i]);
    }
    dfs(0,-1);
    V<int>l(n);
    for (int i=0;i<n;i++) {
        if (dep[i]%2==0) {
            l[i]=vp[i].F;
        }
        else
            l[i]=vp[i].S;
    }
    for (int i=0;i<n;i++) {
        adj[i].clear();
    }
    return l;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cc08xKjo.o: in function `main':
stub.cpp:(.text.startup+0x4fc): undefined reference to `find_next_station(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status