#include "traffic.h"
#include<bits/stdc++.h>
using namespace std;
#define int long long int
#define ld long double
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
#define pll pair<int,int>
#define MOD 1000000007
#define M2 998244353
#define INF 2e18
#define EPS 1e-9
#define pi pair<int,int>
#define minheap priority_queue<int, vector<int>, greater<int>>
const ld PI = 3.14159265358979323846;
const int MX = 1e6 + 5;
int fans = 0;
vector<int> g[MX], nodes(MX), people(MX), children(MX);
void dfs(int v, int parent) {
for (auto x: g[v]) {
if (x == parent) continue;
dfs(x, v);
children[v] += children[x];
people[v] = max(people[v], children[x]);
}
people[v] = max(people[v], fans - children[v] - nodes[v]);
children[v] += nodes[v];
}
int LocateCentre(int n, int p[], int d[], int s[]) {
for (int i = 0; i < n; i++) {
fans += p[i];
nodes[i] = p[i];
}
for (int i = 0; i < n - 1; i++) {
g[s[i]].push_back(d[i]);
g[d[i]].push_back(s[i]);
}
dfs(0, -1);
int sol = INF, res = -1;
for (int i = 0; i < n; i++) {
if (people[i] < sol) {
res = i;
sol = people[i];
}
}
return res;
}
Compilation message
/tmp/ccJwYJS9.o: In function `main':
grader.cpp:(.text.startup+0xd9): undefined reference to `LocateCentre(int, int*, int*, int*)'
collect2: error: ld returned 1 exit status
