Submission #622838

#	Time	Username	Problem	Language	Result	Execution time	Memory
622838		yanndev	Stations (IOI20_stations)	C++17	Compilation error	0 ms	0 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;

const int MX = 1042;

int label[MX];
vector<int> adj[MX];

void dfs(int node, int par, int id) {
	label[node] = id;
	for (auto& x: adj[node])
		if (x != par)
			dfs(x, node, id + 1);
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	vector<int> labels(n);

	for (int i = 0; i + 1 < n; i++) {
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}

	int start = 0;
	for (int i = 0; i < n; i++)
		if ((int)adj[i].size() == 1)
			start = i;

	for (int i = 0; i < n; i++)
		labels[i] = label[i];
	return labels;
}

int find_next_station(int s, int t, vector<int> c) {
	sort(c.begin(), c.end());
	if (s < t)
		return c[1];
	return c[0];
}

Compilation message (stderr)

stations.cpp:7:13: error: 'int label [1042]' redeclared as different kind of entity
    7 | int label[MX];
      |             ^
In file included from stations.cpp:1:
stations.h:3:18: note: previous declaration 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)'
    3 | std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v);
      |                  ^~~~~
stations.cpp: In function 'void dfs(int, int, int)':
stations.cpp:11:12: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   11 |  label[node] = id;
      |            ^
stations.cpp:11:14: error: assignment of read-only location '*(label + ((sizetype)node))'
   11 |  label[node] = id;
      |  ~~~~~~~~~~~~^~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:31:22: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   31 |   labels[i] = label[i];
      |                      ^
stations.cpp:31:22: error: invalid conversion from 'std::vector<int> (*)(int, int, std::vector<int>, std::vector<int>)' to '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} [-fpermissive]
   31 |   labels[i] = label[i];
      |               ~~~~~~~^
      |                      |
      |                      std::vector<int> (*)(int, int, std::vector<int>, std::vector<int>)