Submission #602087

#	Time	Username	Problem	Language	Result	Execution time	Memory
602087		Morisz10	Stations (IOI20_stations)	C++14	0 / 100	3051 ms	2097152 KiB

stations

#include "stations.h"
#include <vector>
#include <algorithm>
#include <iostream>
#include <cassert>
#include <map>
#include <cstdio>
using namespace std;

const int maxn = 1010;
vector<int> g[maxn];
vector<int> lab, siz;
int calc_siz(int x, int p) {
	for (int i : g[x]) {
		if (i == p)continue;
		siz[x] += calc_siz(i, x);
	}
	return siz[x];
}

void calc_lab(int x, int p) {
	int sum = 0, pl = (p < 0 ? maxn : lab[p]);
	for (int i : g[x]) {
		if (i == p)continue;
		if (pl > lab[x]) {
			lab[i] = lab[x] + siz[i] + sum;
		}
		else {
			lab[i] = lab[x] - siz[i] - sum;
		}
		calc_lab(i, x);
		sum += siz[i];
	}
	return;
}

vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	lab.assign(n, 0);
	siz.assign(n, 1);
	for (int i = 0; i < u.size(); i++) {
		g[u[i]].push_back(v[i]);
		g[v[i]].push_back(u[i]);
	}
	calc_siz(0, -1);
	calc_lab(0, -1);
	return lab;
}

int find_next_station(int s, int t, std::vector<int> c) {
	if (s > c[0]) {
		reverse(c.begin(), c.end());
		for (int i : c) {
			if (s > t && t >= i)return i;
		}
		return c.back();
	}
	else {
		for (int i : c) {
			if (s < t && t <= i)return i;
		}
		return c.back();
	}
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:40:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |  for (int i = 0; i < u.size(); i++) {
      |                  ~~^~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61