Submission #359462

#	Time	Username	Problem	Language	Result	Execution time	Memory
359462		Dilshod_Imomov	Stations (IOI20_stations)	C++17	0 / 100	1000 ms	1068 KiB

stations

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

using namespace std;

const int N = 1e3 + 7;

vector < int > lb, adj[N];
int num, timer = 1;

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	for ( int i = 0; i < n; i++ ) {
		adj[i].clear();
	}
	for ( int i = 0; i < n - 1; i++ ) {
		int x = u[i], y = v[i];
		adj[x].push_back(y);
		adj[y].push_back(x);
	}
	num = 0;
	lb.clear();
	lb.resize(n);
	queue < int > q;
	q.push( 0 );
	vector < int > used(n + 1);
	used[0] = 1;
	while ( !q.empty() ) {
		int v = q.front();
		q.pop();
		lb[v] = num++;
		for ( auto u: adj[v] ) {
			if ( !used[u] ) {
				q.push( u );
				used[u] = 1;
			}
		}
	}
	return lb;
}

bool is_ancestor( int b, int a ) {
	if ( b == 0 ) {
		return 1;
	}
	int pr = (a - 1) / 2;
	while ( pr > 0 ) {
		if ( pr == b ) {
			return 1;
		}
		pr = (pr - 1) / 2;
	}
	return 0;
}

int find_next_station(int s, int t, std::vector<int> c) {
	if ( is_ancestor( t, s ) ) {
		return (s - 1) / 2;
	}
	if ( is_ancestor( s * 2, t ) ) {
		return s * 2;
	} 
	return s * 2 + 1;
}

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