Submission #537680

#	Time	Username	Problem	Language	Result	Execution time	Memory
537680		groshi	Stations (IOI20_stations)	C++17	0 / 100	1 ms	576 KiB

stations

#include<iostream>
#include<vector>
#include<algorithm>
#include<stations.h>
using namespace std;
int kiedy=1;
int odw[1010];
vector<int> Q[1010];
void dfs(int x)
{
    odw[x]=kiedy;
    kiedy++;
    for(int i=0;i<Q[x].size();i++)
    {
        int pom=Q[x][i];
        if(odw[pom]!=0)
            continue;
        dfs(pom);
    }
}
vector<int> label(int n,int k,vector<int> u,vector<int> v)
{
    for(int i=0;i<=n+3;i++)
        odw[i]=0;
    for(int i=0;i<=n+3;i++)
        Q[i].clear();
    kiedy=1;
    for(int i=0;i<u.size();i++)
    {
        u[i]++;
        v[i]++;
        Q[u[i]].push_back(v[i]);
        Q[v[i]].push_back(u[i]);
    }
    dfs(1);
    vector<int> wypisz;
    for(int i=1;i<=n;i++)
        wypisz.push_back(odw[i]);
}
int find_next_station(int s,int t,vector<int> c)
{
    for(int i=0;i<c.size();i++)
        if(c[i]==t)
            return c[i];
    if(c[0]>0)
    {
        if(t<s || t>c[c.size()-2])
            return c[c.size()-1];
        else return *lower_bound(c.begin(),c.end(),t);
    }
    else if(t<c[0] || t>s)
        return c[0];
    else return *(lower_bound(c.begin(),c.end(),t)-1);
}

Compilation message (stderr)

stations.cpp: In function 'void dfs(int)':
stations.cpp:13:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     for(int i=0;i<Q[x].size();i++)
      |                 ~^~~~~~~~~~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:28:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for(int i=0;i<u.size();i++)
      |                 ~^~~~~~~~~
stations.cpp:39:1: warning: no return statement in function returning non-void [-Wreturn-type]
   39 | }
      | ^
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:42:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for(int i=0;i<c.size();i++)
      |                 ~^~~~~~~~~

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