Submission #319942

#	Time	Username	Problem	Language	Result	Execution time	Memory
319942		nickmet2004	Stations (IOI20_stations)	C++14	0 / 100	4 ms	492 KiB

stations

#include<bits/stdc++.h>
#include "stations.h"
using namespace std;
const int N = 1505;
int n;
vector<int> adj[N] , R;
int tin[N] , tout[N] , dtime;
void dfs(int u , int p = -1){
    R[u] =tin[u] = dtime++;
    for(int v : adj[u]){
        if(v==p)continue;
        dfs(v  ,u);
    }
    tout[u]= dtime;
}
vector<int> label(int n , int k ,vector<int> u , vector<int> v){
    //for(int i = 0; i < n; ++i) adj[u[i]].emplace_back(v[i]) , adj[v[i]].emplace_back(u[i]);
    R.resize(n);
    dfs(0);
    return R;
}
bool cmp(int a, int b){
    return tin[a] > tin[b];
}
int find_next_station(int s , int t , vector<int> c){
    sort(c.begin() , c.end() , cmp);
    for(int u : c){
        if(tin[u] <= tin[t] && tout[t] <= tout[u]) return u;
    }
    if(tin[s] <= tin[t] && tout[t] <= tout[s]) return s;
    return c[c.size()-1];
}
/*
int main (){
    cin >> n;
    for(int i =1; i < n; ++i){
        int u , v; cin >> u>> v;
        adj[u].emplace_back(v); adj[v].emplace_back(u);
    }
    vector<int> k = label(n , 1 , {3} , {3});
    cout << find_next_station(1 , 3 , {3 , 2 ,0}) << endl;
}
*/

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