Submission #805288

#	Time	Username	Problem	Language	Result	Execution time	Memory
805288		QwertyPi	Traffic (IOI10_traffic)	C++14	Compilation error	0 ms	0 KiB

traffic

#include "traffic.h"

#include <bits/stdc++.h>
using namespace std;
 
const int N = 1e6 + 11;
int p[N], sz[N];
vector<int> G[N];
 
void dfs(int v, int par = -1){
	for(auto i : G[v]){
		if(i != par){
			dfs(i, v);
			sz[v] += sz[i];
		}
	}
	sz[v] += p[v];
}
 
void centroid(int v, int par = -1){
	for(auto i : G[v]){
		if(i != par && sz[i] >= (sz[0] + 1) / 2){
			centroid(i, v);
			return;
		}
	}
	cout << v << endl;
	return;
}
 
int main() {
	int n;
	cin >> n;
	for(int i = 0; i < n; i++){
		cin >> p[i];
	}
	for(int i = 0; i < n - 1; i++){
		int u, v; cin >> u >> v;
		G[u].push_back(v);
		G[v].push_back(u);
	}
	dfs(0);
	centroid(0);
}

int LocateCentre(int N, int pp[], int S[], int D[]) {
   for(int i = 0; i < N - 1; i++){
      G[S[i]].push_back(D[i]);
      G[D[i]].push_back(S[i]);
   }
   dfs(0); return centroid(0);
}

Compilation message (stderr)

traffic.cpp: In function 'int LocateCentre(int, int*, int*, int*)':
traffic.cpp:51:27: error: void value not ignored as it ought to be
   51 |    dfs(0); return centroid(0);
      |                   ~~~~~~~~^~~