Submission #598327

#	Time	Username	Problem	Language	Result	Execution time	Memory
598327		acatmeowmeow	Traffic (IOI10_traffic)	C++11	Compilation error	0 ms	0 KiB

traffic

#include "grader.h"
#include "traffic.h"

#include <bits/stdc++.h>

using namespace std;

void dfs(int u, int e, vector<vector<int>>&adj, vector<int>&dp, int P[]) {
	dp[u] += P[u];
	for (auto&v : adj[u]) {
		if (v == e) continue;
		dfs(v, u, adj, dp, P);
		dp[u] += dp[v];
	}
}

void reroot(int u, int e, vector<vector<int>>&adj, vector<int>&dp, int P[], int&mn, int&ans) {
	int cur = 0;
	for (auto&v : adj[u]) cur = max(cur, dp[v]);
	if (cur < mn) mn = cur, ans = u;
	for (auto&v : adj[u]) {
		if (v == e) continue;
		dp[u] -= dp[v], dp[v] += dp[u];
		reroot(v, u, adj, dp, P, mn, ans);
		dp[v] -= dp[u], dp[u] += dp[v];
	}
}

int LocateCentre(int N, int P[], int S[], int D[]) {
	// build adjacency array
	vector<vector<int>> adj(N + 5);
	for (int i = 0; i < N - 1; i++) adj[S[i]].push_back(D[i]), adj[D[i]].push_back(S[i]);
	// dp
	vector<int> dp(N + 5);
	dfs(0, -1, adj, dp, P);
	// solve for all roots
	int mn = 1e18, ans = -1;
	reroot(0, -1, adj, dp, P, mn, ans);
	return ans;
}

Compilation message (stderr)

traffic.cpp:1:10: fatal error: grader.h: No such file or directory
    1 | #include "grader.h"
      |          ^~~~~~~~~~
compilation terminated.