Submission #481619

#	Time	Username	Problem	Language	Result	Execution time	Memory
481619		SlavicG	Traffic (IOI10_traffic)	C++17	Compilation error	0 ms	0 KiB

traffic

#include "traffic.h"
#include "bits/stdc++.h"
using namespace std;

#define ll long long
 
#define       forn(i,n)              for(int i=0;i<n;i++)
#define          all(v)              v.begin(), v.end()
#define         rall(v)              v.rbegin(),v.rend()
 
#define            pb                push_back
#define          sz(a)               (int)a.size()
 
const int N = 1e6 + 10;
vector<int> adj[N];
ll ss[N];
ll mx[N];

void dfs(int u, int par, vector<int>& p){
    ss[u] = p[u];
    for(int v: adj[u]){
        if(v == par)continue;
        dfs(v, u, p);
        ss[u] += ss[v];
        mx[u] = max(mx[u], ss[v]);
    }
}


int LocateCentre(int n, vector<int> p, vector<int> s, vector<int> d){
    for(int i = 0;i < n - 1;++i){
        int u = s[i], v = d[i];
        adj[u].pb(v);
        adj[v].pb(u);
    }

    dfs(0, -1, p);

    ll ans = mx[0];
    int idx = 0;
    for(int i = 1;i < n;++i){

        if(ans > max(mx[i], ss[0] - ss[i])){
            ans = max(mx[i], ss[0] - ss[i]);
            idx = i;
        }
    }
    return idx;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccEdEgxU.o: in function `main':
grader.cpp:(.text.startup+0xe1): undefined reference to `LocateCentre(int, int*, int*, int*)'
collect2: error: ld returned 1 exit status