Submission #819707

#	Time	Username	Problem	Language	Result	Execution time	Memory
819707		Alihan_8	Stations (IOI20_stations)	C++17	10 / 100	774 ms	556 KiB

stations

#include <bits/stdc++.h>

using namespace std;

#define all(x) x.begin(), x.end()
#define pb push_back
#define ln '\n'
//#define int long long

template <class _T>
bool chmin(_T &x, const _T &y){
    bool flag = false;
    if ( x > y ){
        x = y; flag |= true;
    }
    return flag;
}

template <class _T>
bool chmax(_T &x, const _T &y){
    bool flag = false;
    if ( x < y ){
        x = y; flag |= true;
    }
    return flag;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    vector <int> g[n];
    for ( int i = 0; i + 1 < n; i++ ){
        g[u[i]].pb(v[i]);
        g[v[i]].pb(u[i]);
    }
    vector <int> ans(n, -1);
    ans[0] = 0;
    function <void(int)> dfs = [&](int x){
        int cnt = 1;
        for ( auto to: g[x] ){
            if ( ans[to] == -1 ){
                ans[to] = ans[x] * 8 + cnt;
                cnt++;
                dfs(to);
            }
         }
    };
    dfs(0);
    return ans;
}

int find_next_station(int s, int t, vector<int> c) {
    while ( t > 0 ){
        if ( t / 8 == s ){
            return t;
        }
        t /= 8;
    }
    return s / 8;
}

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