Submission #416580

#	Time	Username	Problem	Language	Result	Execution time	Memory
416580		Dilshod_Imomov	Stations (IOI20_stations)	C++17	10 / 100	867 ms	55552 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
 
const int MAXN = 1e3 + 7;
 
void dfs( vector<vector<int>> adj, int v, int p, vector<int> &lb, int &cnt ) {
	lb[v] = cnt++;
	for ( auto u: adj[v] ) {
		if ( u != p ) {
			dfs( adj, u, v, lb, cnt );
		}
	}
	lb[v] *= 1000;
	if ( cnt == 1000000 ) {
		cnt--;
	}
	lb[v] += cnt;
}
 
 
vector<int> label(int n, int k, vector<int> U, vector<int> V) {
	vector < vector < int > > adj(n + 1);
	for ( int i = 0; i < n - 1; i++ ) {
		int u = U[i], v = V[i];
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	vector < int > lb(n);
	int cnt = 0;
	dfs( adj, 0, -1, lb, cnt );
	return lb;
}
 
int find_next_station(int s, int t, vector<int> c) {
	int tins = s / 1000, touts = s % 1000;
	int tint = t / 1000, toutt = t % 1000;
	int pr = -1;
	for ( auto u: c ) {
		int tinu = u / 1000, toutu = u % 1000;
		if ( tinu <= tins && toutu >= touts ) {
			pr = u;
			continue;
		}
		if ( tinu <= tint && toutu >= toutt ) {
			return u;
		}
	}
	assert( pr != -1 );
	return pr;
}

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