Submission #675926

#	Time	Username	Problem	Language	Result	Execution time	Memory
675926		Essa2006	Stations (IOI20_stations)	C++14	0 / 100	831 ms	672 KiB

stations

#include<bits/stdc++.h>
using namespace std;
#define all(a) a.begin(), a.end()
vector<int>Vis, new_, dt, ft;
vector<vector<int>>A;
bool even=1;
int time_;
void dfs(int ind){
    Vis[ind]=1;
    bool odd=!even;
    if(!odd)
        new_[ind]=time_++;
    for(int i=0;i<A[ind].size();i++)
        if(!Vis[A[ind][i]]){
            even=odd;
            dfs(A[ind][i]);
        }
    if(odd) new_[ind]=time_++;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    Vis.clear(), A.clear(), new_.clear(), dt.clear(), ft.clear();
    Vis.resize(n), A.resize(n), new_.resize(n), dt.resize(n), ft.resize(n);
    time_=0;
    for(int i=0;i<n-1;i++)
        A[u[i]].push_back(v[i]), A[v[i]].push_back(u[i]);
    dfs(0);
    return new_;
}
int find_next_station(int s, int t, vector<int> c) {
    if(c[0]>s){
        if(t>s)
            return c.front();
        int ind=upper_bound(all(c), t)-c.begin();
        ind--;
        return c[ind];
    }
    else{
        if(t<s) return c.back();
        return *lower_bound(all(c), t);
    }
}

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<A[ind].size();i++)
      |                 ~^~~~~~~~~~~~~~

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