Submission #462518

#	Time	Username	Problem	Language	Result	Execution time	Memory
462518		wind_reaper	Stations (IOI20_stations)	C++17	Compilation error	0 ms	0 KiB

stations

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

using namespace std;

vector<int> g[1000];
int timer;

void dfs(vector<int>& tin, int u, int p, int& timer, int d){
	if(!d) tin[u] = timer++;
	for(int v : g[u]) if(v != p){
		dfs(tin, v, u, 1 - d);
	}
	if(d) tin[u] = timer++;
}

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

	dfs(g, tin, 0, -1, 0, 0);

	return tin;
}

int find_next_station(int s, int t, vector<int> c){
	int m = cc.size(), i;
	if(s < c[0]){
		for(i = 0; i < m - 1; i++)
			if(i == 0 ? s : c[i-1] < t && c[i] >= t)
				break;
	}
	else{
		for(int i = m - 1; i > 0; --i)
			if(i + 1 == m ? s : c[i+1] > t && c[i] <= t)
				break;
	}

	return c[i];
}

Compilation message (stderr)

stations.cpp: In function 'void dfs(std::vector<int>&, int, int, int&, int)':
stations.cpp:12:20: error: cannot bind non-const lvalue reference of type 'int&' to an rvalue of type 'int'
   12 |   dfs(tin, v, u, 1 - d);
      |                  ~~^~~
stations.cpp:9:47: note: in passing argument 4 of 'void dfs(std::vector<int>&, int, int, int&, int)'
    9 | void dfs(vector<int>& tin, int u, int p, int& timer, int d){
      |                                          ~~~~~^~~~~
stations.cpp: In function 'std::vector<int> label(int, int, int, int)':
stations.cpp:19:6: error: invalid types 'int[int]' for array subscript
   19 |   g[u[i]].push_back(v[i]);
      |      ^
stations.cpp:19:22: error: invalid types 'int[int]' for array subscript
   19 |   g[u[i]].push_back(v[i]);
      |                      ^
stations.cpp:20:6: error: invalid types 'int[int]' for array subscript
   20 |   g[v[i]].push_back(u[i]);
      |      ^
stations.cpp:20:22: error: invalid types 'int[int]' for array subscript
   20 |   g[v[i]].push_back(u[i]);
      |                      ^
stations.cpp:24:6: error: invalid initialization of reference of type 'std::vector<int>&' from expression of type 'std::vector<int> [1000]'
   24 |  dfs(g, tin, 0, -1, 0, 0);
      |      ^
stations.cpp:9:23: note: in passing argument 1 of 'void dfs(std::vector<int>&, int, int, int&, int)'
    9 | void dfs(vector<int>& tin, int u, int p, int& timer, int d){
      |          ~~~~~~~~~~~~~^~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:30:10: error: 'cc' was not declared in this scope; did you mean 'c'?
   30 |  int m = cc.size(), i;
      |          ^~
      |          c
stations.cpp:32:7: error: 'i' was not declared in this scope
   32 |   for(i = 0; i < m - 1; i++)
      |       ^
stations.cpp:42:11: error: 'i' was not declared in this scope
   42 |  return c[i];
      |           ^