Submission #349978

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
349978	2021-01-18T19:15:32 Z	evn	Stations (IOI20_stations)	C++14	Compilation error	0 ms	0 KB

stations

#include <bits/stdc++.h>
#include "stations.h"
using namespace std;
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define sz(a) a.size()
typedef long long ll;
typedef pair<int, int> pii;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template<class T> using oset=tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
int timer = 0;
int depth[1005];
int in[1005];
int out[1005];
vector<int> adj[1005];
vector<int> labels(n);

void dfs(int u, int p){
	if(depth[u] % 2 == 0)labels[u] = timer++;
	for(int v : adj[u]){
		if(v != p){
			depth[v] = depth[u]+1;
			dfs(v, u);
		}
	}
	if(depth[u] % 2 == 1)labels[u] = timer++;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	for(int i = 0; i < n;i ++){
		adj[i].clear();
		depth[i] = 0;
	}
	for(int i = 0; i < u.size(); i++){
		int a, b;
		a = u[i];
		b = v[i];
		adj[a].pb(b);
		adj[b].pb(a);
	}
	dfs(0, -1);
	return labels;
}

int find_next_station(int s, int t, vector<int> c) {
	if(c.size() == 1)return c[0];
	if(c[0] > s){
		//this is the in value
		if(t < s || t >= c[c.size()-1])return c[c.size()-1];
		for(int i = 0;i < c.size()-1; i++){
			if(t <= c[i])return c[i];
		}
	}
	else{
		//this is the out value
		if(t <= c[0] || t > s)return c[0];
		for(int i = c.size()-1; i >= 1; i--){
			if(t >= c[i])return c[i];
		}
	}
}

Compilation message

stations.cpp:20:20: error: 'n' was not declared in this scope; did you mean 'in'?
   20 | vector<int> labels(n);
      |                    ^
      |                    in
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:37:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |  for(int i = 0; i < u.size(); i++){
      |                 ~~^~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:53:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |   for(int i = 0;i < c.size()-1; i++){
      |                 ~~^~~~~~~~~~~~
stations.cpp:64:1: warning: control reaches end of non-void function [-Wreturn-type]
   64 | }
      | ^