Submission #591642

#	Time	Username	Problem	Language	Result	Execution time	Memory
591642		Morisz10	Stations (IOI20_stations)	C++14	Compilation error	0 ms	0 KiB

stations

#include "stations.h"
#include <vector>
#include <algorithm>
#include <iostream>
using namespace std;
const int maxn = 1000;
vector<int> g[maxn];
int l;
vector<int> labels, max_label, r_label;
int dfs(int x, int p) {
	max_label[x] = labels[x] = l++;
	r_label[labels[x]] = x;
	for (int i : g[x]) {
		if (i != p)max_label[x] = dfs(i, x);
	}
	return max_label[x];
}

vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	labels.assign(n, 0);
	for (int i = 0; i < n; i++)g[i] = {};
	max_label = labels;
	r_label = labels;
	for (int i = 0; i < u.size(); i++) {
		g[u[i]].push_back(v[i]);
		g[v[i]].push_back(u[i]);
	}
	l = 0;
	dfs(0, -1);
	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
	for (int i = 0; i < c.size() - 1; i++) {
		if (t < c[i + 1])return c[i];
	}
	return t > max_label[r_label[c.back()]] ? c[0] : c.back();
}

int main() {
	int n, k;
	cin >> n >> k;
	vector<int> u(n - 1), v(n - 1);
	for (int i = 0; i < n - 1; i++) {
		cin >> u[i] >> v[i];
	}
	label(n, k, u, v);
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:24:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |  for (int i = 0; i < u.size(); i++) {
      |                  ~~^~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:34:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |  for (int i = 0; i < c.size() - 1; i++) {
      |                  ~~^~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cckMqeUH.o: in function `main':
stub.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccHBJNsK.o:stations.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status