Submission #364786

#	Time	Username	Problem	Language	Result	Execution time	Memory
364786		leinad2	Stations (IOI20_stations)	C++17	52.32 / 100	1101 ms	1364 KiB

stations

#include "stations.h"
#include<bits/stdc++.h>
using namespace std;
vector<int>adj[1010];
int in[1010], out[1010], cnt, vis[1010];
void dfs(int v)
{
    in[v]=++cnt;
    for(int i=0;i<adj[v].size();i++)
    {
        int p=adj[v][i];
        if(!vis[p])
        {
            vis[p]=1;
            dfs(p);
        }
    }
    out[v]=cnt;
}
vector<int>label(int n, int k, vector<int>u, vector<int>v)
{
	vis[0]=1;
  for(int i=1;i<n;i++)vis[i]=0;
  cnt=0;
  for(int i=0;i<n;i++)in[i]=out[i]=0,adj[i].clear();
	for(int i=0;i<u.size();i++)
    {
        adj[u[i]].push_back(v[i]);
        adj[v[i]].push_back(u[i]);
    }
    dfs(0);
    vector<int>ans;
    for(int i=0;i<n;i++)ans.push_back(in[i]*1000+out[i]-1001);
    return ans;
}
int find_next_station(int s, int t, vector<int>c)
{
    int aa=s/1000;
    int bb=s%1000;
    int cc=t/1000;
    int dd=t%1000;
    if(cc<=aa&&bb<=dd||bb<cc||dd<aa)
    {
        for(int i=0;i<c.size();i++)
        {
            int ee=c[i]/1000;
            int ff=c[i]%1000;
            if(ee<=aa&&bb<=ff)return c[i];
        }
    }
    for(int i=0;i<c.size();i++)
    {
        int ee=c[i]/1000;
        int ff=c[i]%1000;
        if(ee<=cc&&dd<=ff&&!(ee<=aa&&bb<=ff))return c[i];
    }
}

Compilation message (stderr)

stations.cpp: In function 'void dfs(int)':
stations.cpp:9:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int i=0;i<adj[v].size();i++)
      |                 ~^~~~~~~~~~~~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:26:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |  for(int i=0;i<u.size();i++)
      |              ~^~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:42:14: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   42 |     if(cc<=aa&&bb<=dd||bb<cc||dd<aa)
      |        ~~~~~~^~~~~~~~
stations.cpp:44:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |         for(int i=0;i<c.size();i++)
      |                     ~^~~~~~~~~
stations.cpp:51:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     for(int i=0;i<c.size();i++)
      |                 ~^~~~~~~~~
stations.cpp:57:1: warning: control reaches end of non-void function [-Wreturn-type]
   57 | }
      | ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 26.3205 / 61