Submission #306961

#	Time	Username	Problem	Language	Result	Execution time	Memory
306961		giorgikob	Stations (IOI20_stations)	C++14	0 / 100	873 ms	872 KiB

stations

#include "stations.h"
#include <vector>
#include<bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
#define pb push_back
using namespace std;

const int N = 1e3+5;

vector<int>gr[N];

int cnt = 0;
int fix[N];
//int c = 0;

void dfs(int x, vector<int>&v){
    fix[x] = 1;
    for(auto to : gr[x]){
        if(fix[to]) continue;
        dfs(to,v);
    }
    v[x] = cnt; cnt++;
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	std::vector<int> labels(n,0);

	//for(int i = 0; i < n; i ++ ) labels[i] = i;

	for(int i = 0; i < u.size(); i++){
        int x = u[i];
        int y = v[i];
        gr[x].pb(y);
        gr[y].pb(x);
	}
    if(k == 1000) cnt = 0;
    dfs(0,labels);
	for(int i = 0; i < n; i++) gr[i].clear(), fix[i] = 0;

	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
    if(s < t) return c.back();
    int x = t; bool ok = false;
    while(x != 0){
        x = (x-1)/2;
        if(x == s){
            ok = true;
        }
    }
    if(!ok) return c.back();
    for(int i = 0; i < c.size(); i++){
        if(c[i] >= t)
            return c[i];
    }
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:32:19: 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 = 0; i < u.size(); i++){
      |                 ~~^~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:55:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |     for(int i = 0; i < c.size(); i++){
      |                    ~~^~~~~~~~~~
stations.cpp:59:1: warning: control reaches end of non-void function [-Wreturn-type]
   59 | }
      | ^

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