Submission #781029

#	Time	Username	Problem	Language	Result	Execution time	Memory
781029		Blagoj	Stations (IOI20_stations)	C++17	0 / 100	732 ms	604 KiB

stations

#include <bits/stdc++.h>
#include "stations.h"

using namespace std;

vector<int> g[1005], labels;
int in[1005], out[1005], timer = 0;

void dfs(int n, int p) {
	labels[n] = timer++;
	for (auto x : g[n]) if (x != p) dfs(x, n);
}
 
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	labels.resize(n, 0);
	for (int i = 0; i < n; i++) g[i].clear();
	timer = 0;
	for (int i = 0; i < u.size(); i++) {
		g[u[i]].push_back(v[i]);
		g[v[i]].push_back(u[i]);
	}
	dfs(0, -1);
	return labels;
}

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

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:18:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |  for (int i = 0; i < u.size(); i++) {
      |                  ~~^~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:32:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  for (int i = p; i < c.size() - 1; i++) if (c[i] <= t && t < c[i + 1]) return c[i];
      |                  ~~^~~~~~~~~~~~~~
stations.cpp:33:1: warning: control reaches end of non-void function [-Wreturn-type]
   33 | }
      | ^

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