oj.uz

Submission #430189

# Submission time Handle Problem Language Result Execution time Memory
430189 2021-06-16T11:59:01 Z amoo_safar Stations (IOI20_stations) C++17
0 / 100
 1099 ms 852 KB 
#include "stations.h"

#include <bits/stdc++.h>

#define F first
#define S second
#define pb push_back
#define all(x) x.begin(), x.end()

using namespace std;

typedef long long ll;

const int N = 2020;

vector<int> G[N];
int T = 0;
int st[N];

void DFS(int u, int p, int d){
	if(d)
		st[u] = T ++;

	for(auto adj : G[u])
		if(adj != p)
			DFS(adj, u, d ^ 1);

	if(!d)
		st[u] = T ++;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	T = 0;
	for(int i = 0; i < n; i++) G[i].clear();

	for(int i = 0; i < n - 1; i++)
		G[u[i]].pb(v[i]), G[v[i]].pb(u[i]);
	DFS(0, -1, 1);
	vector<int> labels(n);
	for (int i = 0; i < n; i++)
		labels[i] = st[i];
	// cerr << "edges {\n";
	// for(int i = 0; i < n - 1; i++)
	// 	cerr << u[i] << " -> " << v[i] << '\n';
	// cerr << "}\n";
	// for(int i = 0; i < n; i++)
	// 	cerr << i << " : " << labels[i] << '\n';
	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
	int sz = c.size();
	if(s == 0){
		sort(all(c));
		for(auto x : c)
			if(t <= x)
				return x;
		return c[0];
	}
	if(s < c[0]){
		sort(all(c));
		int dad = c.back();
		if(t < s) return c.back();
		for(int i = 0; i < sz - 1; i++){
			if(t <= c[i])
				return c[i];
		}
		return dad;
	} else {
		sort(all(c));
		int dad = c[0];
		if(t > s) return c.back();
		for(int i = sz - 1; i > 0; i--){
			if(t >= c[i])
				return c[i];
		}
		return dad;
	}
	return c[0];
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 618 ms 784 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 500 ms 712 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 557 ms 784 KB Wrong query response.
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1099 ms 656 KB Output is correct
2 Correct 806 ms 852 KB Output is correct
3 Incorrect 768 ms 656 KB Wrong query response.
4 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Incorrect 645 ms 792 KB Wrong query response.
2 Halted 0 ms 0 KB -