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Submission #434109

# Submission time Handle Problem Language Result Execution time Memory
434109 2021-06-20T15:06:54 Z kwongweng Stations (IOI20_stations) C++17
100 / 100
 1186 ms 940 KB 
#include <bits/stdc++.h>
#include "stations.h"
using namespace std;
typedef vector<int> vi;
#define pb push_back

vi g[2000];
vi ans, sz, used;
int cur;

void dfs1(int u = 0, int p = -1, int d = 0){
	for (int v : g[u]){
		if (v == p) continue;
		dfs1(v, u, d+1);
		sz[u] += sz[v] + 1;
	}
}

void dfs2(int u = 0, int p = -1, int d = 0){
	if (d % 2 == 0){
		used[cur] = 1;
		ans[u] = cur;
		while (used[cur]) cur++;
	}else{
		used[cur+sz[u]] = 1;
		ans[u] = cur+sz[u];
		while (used[cur]) cur++;
	}
	for (int v : g[u]){
		if (v == p) continue;
		dfs2(v, u, d+1);
	}
}

vi label(int n, int k, vi u, vi v) {
	cur = 0;
	vi answer; answer.resize(n, 0);
	ans.resize(n, 0); sz.resize(n, 0); used.resize(n, 0);
	for (int i = 0; i < n-1; i++){
		g[u[i]].pb(v[i]);
		g[v[i]].pb(u[i]);
	}
	dfs1();
	dfs2();
	answer = ans;
	ans.clear(); sz.clear(); used.clear();
	for (int i = 0; i < n; i++) g[i].clear();
	return answer;
}

int find_next_station(int s, int t, vi c) {
	int C = c.size();
	if (C==1) return c[0];
	if (s < c[0]){
		if (t < s || t >= c[C-1]) return c[C-1];
		int ans = s;
		for (int i = 0; i < C-1; i++){
			if (ans < t && t <= c[i]) return c[i];
			ans = c[i];
		}
		return c[C-1];
	}
	if (t > s || t <= c[0]) return c[0];
	int ans = s;
	for (int i = C-1; i > 0; i--){
		if (ans > t && t >= c[i]) return c[i];
		ans = c[i];
	}
	return c[0];
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 581 ms 784 KB Output is correct
2 Correct 501 ms 784 KB Output is correct
3 Correct 1053 ms 656 KB Output is correct
4 Correct 844 ms 660 KB Output is correct
5 Correct 666 ms 660 KB Output is correct
6 Correct 616 ms 784 KB Output is correct
7 Correct 511 ms 660 KB Output is correct
8 Correct 3 ms 724 KB Output is correct
9 Correct 5 ms 724 KB Output is correct
10 Correct 2 ms 724 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 547 ms 656 KB Output is correct
2 Correct 672 ms 656 KB Output is correct
3 Correct 892 ms 656 KB Output is correct
4 Correct 754 ms 668 KB Output is correct
5 Correct 694 ms 656 KB Output is correct
6 Correct 580 ms 656 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 598 ms 780 KB Output is correct
2 Correct 558 ms 788 KB Output is correct
3 Correct 1025 ms 656 KB Output is correct
4 Correct 772 ms 656 KB Output is correct
5 Correct 751 ms 728 KB Output is correct
6 Correct 638 ms 784 KB Output is correct
7 Correct 516 ms 784 KB Output is correct
8 Correct 3 ms 732 KB Output is correct
9 Correct 5 ms 724 KB Output is correct
10 Correct 1 ms 724 KB Output is correct
11 Correct 612 ms 660 KB Output is correct
12 Correct 547 ms 900 KB Output is correct
13 Correct 534 ms 784 KB Output is correct
14 Correct 547 ms 656 KB Output is correct
15 Correct 50 ms 656 KB Output is correct
16 Correct 58 ms 676 KB Output is correct
17 Correct 142 ms 656 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1186 ms 656 KB Output is correct
2 Correct 829 ms 668 KB Output is correct
3 Correct 595 ms 660 KB Output is correct
4 Correct 3 ms 724 KB Output is correct
5 Correct 3 ms 720 KB Output is correct
6 Correct 2 ms 724 KB Output is correct
7 Correct 643 ms 656 KB Output is correct
8 Correct 1132 ms 656 KB Output is correct
9 Correct 659 ms 664 KB Output is correct
10 Correct 844 ms 664 KB Output is correct
11 Correct 7 ms 724 KB Output is correct
12 Correct 7 ms 728 KB Output is correct
13 Correct 6 ms 724 KB Output is correct
14 Correct 5 ms 724 KB Output is correct
15 Correct 3 ms 732 KB Output is correct
16 Correct 556 ms 668 KB Output is correct
17 Correct 638 ms 656 KB Output is correct
18 Correct 589 ms 656 KB Output is correct
19 Correct 542 ms 660 KB Output is correct
20 Correct 529 ms 656 KB Output is correct

Subtask #5
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 622 ms 788 KB Output is correct
2 Correct 494 ms 784 KB Output is correct
3 Correct 963 ms 656 KB Output is correct
4 Correct 689 ms 712 KB Output is correct
5 Correct 670 ms 668 KB Output is correct
6 Correct 435 ms 784 KB Output is correct
7 Correct 437 ms 712 KB Output is correct
8 Correct 3 ms 724 KB Output is correct
9 Correct 4 ms 724 KB Output is correct
10 Correct 2 ms 724 KB Output is correct
11 Correct 536 ms 656 KB Output is correct
12 Correct 552 ms 656 KB Output is correct
13 Correct 998 ms 656 KB Output is correct
14 Correct 690 ms 656 KB Output is correct
15 Correct 697 ms 656 KB Output is correct
16 Correct 493 ms 664 KB Output is correct
17 Correct 632 ms 656 KB Output is correct
18 Correct 499 ms 788 KB Output is correct
19 Correct 506 ms 904 KB Output is correct
20 Correct 532 ms 664 KB Output is correct
21 Correct 62 ms 684 KB Output is correct
22 Correct 78 ms 688 KB Output is correct
23 Correct 128 ms 656 KB Output is correct
24 Correct 6 ms 724 KB Output is correct
25 Correct 8 ms 676 KB Output is correct
26 Correct 6 ms 724 KB Output is correct
27 Correct 6 ms 724 KB Output is correct
28 Correct 2 ms 724 KB Output is correct
29 Correct 499 ms 656 KB Output is correct
30 Correct 600 ms 660 KB Output is correct
31 Correct 649 ms 656 KB Output is correct
32 Correct 536 ms 664 KB Output is correct
33 Correct 690 ms 656 KB Output is correct
34 Correct 409 ms 832 KB Output is correct
35 Correct 411 ms 792 KB Output is correct
36 Correct 492 ms 784 KB Output is correct
37 Correct 505 ms 780 KB Output is correct
38 Correct 560 ms 660 KB Output is correct
39 Correct 501 ms 656 KB Output is correct
40 Correct 522 ms 780 KB Output is correct
41 Correct 542 ms 660 KB Output is correct
42 Correct 70 ms 656 KB Output is correct
43 Correct 128 ms 684 KB Output is correct
44 Correct 146 ms 656 KB Output is correct
45 Correct 155 ms 792 KB Output is correct
46 Correct 342 ms 656 KB Output is correct
47 Correct 324 ms 656 KB Output is correct
48 Correct 71 ms 804 KB Output is correct
49 Correct 63 ms 940 KB Output is correct