Submission #939983

#	Time	Username	Problem	Language	Result	Execution time	Memory
939983		Warinchai	Stations (IOI20_stations)	C++14	0 / 100	543 ms	972 KiB

stations

#include "stations.h"
#include <vector>
#include<bits/stdc++.h>
using namespace std;
vector<int>adj[1005];
int ar[1005];
int in[1005];
int out[1005];
int cur=-1;
int rv[1005];
void dfs(int u,int p=-1){
    in[u]=++cur;
    rv[cur]=u;
    for(auto x:adj[u])if(x!=p)dfs(x,u);
    out[u]=cur;
}
vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
    vector<int>ans;
    for(int i=0;i<=n;i++)adj[i].clear();
	for(int i=0;i<n-1;i++)adj[u[i]].push_back(v[i]),adj[v[i]].push_back(u[i]);
    dfs(0);
    for(int i=0;i<n;i++)ans.push_back(in[i]);
    //for(int i=0;i<n;i++)cerr<<in[i]<<"\n";
	return ans;
}

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

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:30:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for(int i=1;i<c.size()-1;i++)if(t>=c[i]&&t<c[i+1])return c[i];
      |                 ~^~~~~~~~~~~

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