Submission #616894

#	Time	Username	Problem	Language	Result	Execution time	Memory
616894		John3_141592	Stations (IOI20_stations)	C++14	5 / 100	1388 ms	660 KiB

stations

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

using namespace std;

vector <int> grafo[1003];
int arr[1003],C;
bool vis[1003];

void dfs(int node,int c){
    vis[node]=true;
    if(c) arr[node]=C++;
    for(auto i:grafo[node]) if(!vis[i]) dfs(i,c^1);
    if(!c) arr[node]=C++;
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    for(int i=0;i<n;i++) grafo[i].clear();
    for(int i=0;i<n-1;i++) grafo[u[i]].push_back(v[i]),grafo[v[i]].push_back(u[i]);
    fill(arr,arr+n+1,0);
    fill(vis,vis+n+1,false);
    C=0,dfs(0,0);
    vector <int> solve;
    for(int i=0;i<n;i++) solve.push_back(arr[i]);
    return solve;
}

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

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:36:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for(int i=1;i<c.size();i++) if(c[i]<=t) return c[i];
      |                 ~^~~~~~~~~

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