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Submission #1028237

# Submission time Handle Problem Language Result Execution time Memory
1028237 2024-07-19T15:30:05 Z Tob Traffic (IOI10_traffic) C++14
0 / 100
 10 ms 23896 KB 
#include <bits/stdc++.h>

#include "traffic.h"

#define F first
#define S second
#define all(x) x.begin(), x.end()
#define pb push_back
#define FIO ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

using namespace std;

typedef long long ll;
typedef pair <ll, ll> pii;

const int N = 1e6 + 7;

int sum;
int a[N], siz[N];
vector <int> adj[N];

int dfs(int x, bool rev, int p = -1, int d = sum) {
	if (!rev) {
		siz[x] = a[x];
		for (auto y : adj[x]) {
			if (y == p) continue;
			siz[x] += dfs(y, 0, x);
		}
		return siz[x];
	}
	else {
		int mx = d;
		for (auto y : adj[x]) if (y != p) mx = max(mx, siz[y]);
		int mn = mx;
		for (auto y : adj[x]) if (y != p) mn = min(mn, dfs(y, 1, x, sum-siz[y]));
		return mn;
	}
}

int LocateCentre(int n, int pp[], int S[], int D[]) {
	for (int i = 0; i < n; i++) a[i] = pp[i], sum += pp[i];
	for (int i = 0; i < n-1; i++) {
		adj[S[i]].pb(D[i]);
		adj[D[i]].pb(S[i]);
	}
	dfs(0, 0);
	return dfs(0, 1);
}

//-----------------------------------------
/*
static int NN,PP[1000000],SS[1000000],DD[1000000];

int main(){
	int i;
	scanf("%d",&NN);
	for (i=0;i<NN;i++) scanf("%d",&PP[i]);
	for (i=0;i<NN-1;i++) scanf("%d%d",&SS[i],&DD[i]);
	int r = LocateCentre(NN,PP,SS,DD);
	printf("%d\n",r);
	return 0;
}*/

Subtask #1
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23896 KB Output is correct
2 Incorrect 10 ms 23896 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23896 KB Output is correct
2 Incorrect 10 ms 23896 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23896 KB Output is correct
2 Incorrect 10 ms 23896 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 23896 KB Output is correct
2 Incorrect 10 ms 23896 KB Output isn't correct
3 Halted 0 ms 0 KB -