oj.uz

Submission #396082

# Submission time Handle Problem Language Result Execution time Memory
396082 2021-04-29T12:29:52 Z InternetPerson10 Stations (IOI20_stations) C++17
0 / 100
 1029 ms 656 KB 
#include "stations.h"
#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

vector<vector<int>> adj;
vector<int> sub;
vector<int> labels;

int sub_calc(int v, int par) {
	int ans = 1;
	for(int i = 0; i < (int)adj[v].size(); i++) {
		if(adj[v][i] == par) continue;
		ans += sub_calc(adj[v][i], v);
	}
	// cout << v << ' ' << ans << '\n';
	sub[v] = ans;
	return sub[v];
}

void rec(int v, int l, int u, int par, int d) { // even: min, odd: max
	if(d%2) { 
		labels[v] = u-1;
		u--;
	}
	else {
		labels[v] = l;
		l++;
	}
	for(int i = 0; i < (int)adj[v].size(); i++) {
		if(adj[v][i] == par) continue;
		rec(adj[v][i], l, l + sub[adj[v][i]], v, d+1);
		l += sub[adj[v][i]];
	}
	// cout << v << ' ' << labels[v] << '\n';
	return;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	vector<vector<int>>().swap(adj);
	vector<int>().swap(sub);
	vector<int>().swap(labels);
	for(int i = 0; i < n; i++) {
		adj.push_back(vector<int>());
		sub.push_back(0);
		labels.push_back(0);
	}
	for(int i = 0; i < n-1; i++) {
		int x = u[i];
		int y = v[i];
		adj[x].push_back(y);
		adj[y].push_back(x);
	}
	sub_calc(0, -1);
	rec(0, 0, n, -1, 0);
	return labels;
}

int find_next_station(int s, int t, vector<int> c) {
	return c[0];
	if(s < c[0]) {
		sort(c.begin(), c.end());
		if(t < s) return c[c.size() - 1];
		for(int i = 0; i < (int)c.size(); i++) {
			if(t <= c[i]) return c[i];
		}
		return c[c.size()-1];
	}
	else {
		sort(c.rbegin(), c.rend());
		if(t >= s) return c[c.size() - 1];
		for(int i = 0; i < (int)c.size(); i++) {
			if(t >= c[i]) return c[i];
		}
		return c[c.size()-1];
	}
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 661 ms 656 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 477 ms 620 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 627 ms 652 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1029 ms 400 KB Output is correct
2 Incorrect 620 ms 528 KB Wrong query response.
3 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Incorrect 594 ms 616 KB Wrong query response.
2 Halted 0 ms 0 KB -