Submission #582802

#	Time	Username	Problem	Language	Result	Execution time	Memory
582802		LucaIlie	Stations (IOI20_stations)	C++17	0 / 100	1 ms	464 KiB

stations

//#include "stations.h"
#include <bits/stdc++.h>

#define MAX_N 1000

using namespace std;

int l;
vector<int> edges[MAX_N];
vector<int> labels;

void dfs( int u, int p, int d ) {
    if ( d == 0 )
        labels[u] = l * 2;
    l++;
    for ( int v: edges[u] ) {
        if ( v != p )
            dfs( v, u, !d );
    }
    if ( d == 1 )
        labels[u] = l * 2 + 1;
    if ( edges[u].size() > 1 )
        l++;
}

vector<int> label( int n, int k, vector<int> u, vector<int> v ) {

    for ( int i = 0; i < n - 1; i++ ) {
        edges[u[i]].push_back( v[i] );
        edges[v[i]].push_back( u[i] );
    }

    l = 0;
    dfs( 0, -1, 0 );

    return labels;
}

int find_next_station( int s, int t, vector<int> c ) {
    int l, r, i;

    if ( s % 2 == 0 ) {
        l = s / 2;
        r = c.back() / 2 + 1;
    } else {
        l = c[1] / 2 - 1;
        r = s / 2;
    }
    s /= 2;
    t /= 2;

    if ( t < l || t > r )
        return c[0];

    i = 1;
    while ( t < c[i] / 2 )
        i++;
    return c[i];
}

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