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Submission #342051

# Submission time Handle Problem Language Result Execution time Memory
342051 2021-01-01T08:12:02 Z SeDunion Stations (IOI20_stations) C++17
100 / 100
 1111 ms 1380 KB 
#include "stations.h"
#include <bits/stdc++.h>

using namespace std;

vector<int> g[2002];

int tin[2002], tout[2002], timer;

void dfs(int v, vector<int> &labels, int p = -1, int d = 0) {
	if (!d) labels[v] = timer++;
	for (int to : g[v]) if (to != p) {
		dfs(to, labels, v, d ^ 1);
	}
	if (d) labels[v] = timer++;
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	std::vector<int> labels(n);
	for (int i = 0; i < n; i++) {
		g[i].clear();
	}
	timer = 0;
	for (int i = 0 ; i < n - 1 ; ++ i) {
		g[u[i]].push_back(v[i]);
		g[v[i]].push_back(u[i]);
	}
	dfs(1, labels);
	return labels;
}

bool upper(int ina, int outa, int inb, int outb) {
	return ina <= inb && outa >= outb;
}

int find_next_station(int s, int t, std::vector<int> c) {
	// upper(s, t) return s->c->t
	// return pred
	int m = (int)c.size();
	vector<int> din(m), dout(m);
	int sin, sout;
	if (s < c[0]) { // s->in
		sin = s;
		if (m > 1) sout = c[m - 2];
		else sout = s;
		if (sin <= t && t <= sout) {
			for (int i = 0 ; i < m - 1 ; ++ i) {
				if (c[i] >= t) return c[i];
			}
		} else {
			return c[m - 1];
		}
	} else {
		sout = s;
		if (m > 1) sin = c[1];
		else sin = s;
		if (sin <= t && t <= sout) {
			for (int i = m - 1 ; i > 0 ; -- i) {
				if (c[i] <= t) return c[i];
			}
		} else {
			return c[0];
		}
	}
	
}

Compilation message

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:40:19: warning: control reaches end of non-void function [-Wreturn-type]
   40 |  vector<int> din(m), dout(m);
      |                   ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 534 ms 864 KB Output is correct
2 Correct 465 ms 1012 KB Output is correct
3 Correct 964 ms 924 KB Output is correct
4 Correct 670 ms 736 KB Output is correct
5 Correct 597 ms 736 KB Output is correct
6 Correct 592 ms 1048 KB Output is correct
7 Correct 501 ms 864 KB Output is correct
8 Correct 3 ms 924 KB Output is correct
9 Correct 5 ms 736 KB Output is correct
10 Correct 2 ms 736 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 490 ms 864 KB Output is correct
2 Correct 663 ms 1124 KB Output is correct
3 Correct 1111 ms 924 KB Output is correct
4 Correct 681 ms 924 KB Output is correct
5 Correct 598 ms 864 KB Output is correct
6 Correct 585 ms 876 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 602 ms 864 KB Output is correct
2 Correct 487 ms 864 KB Output is correct
3 Correct 907 ms 932 KB Output is correct
4 Correct 675 ms 992 KB Output is correct
5 Correct 567 ms 1244 KB Output is correct
6 Correct 494 ms 1068 KB Output is correct
7 Correct 532 ms 1064 KB Output is correct
8 Correct 3 ms 736 KB Output is correct
9 Correct 5 ms 864 KB Output is correct
10 Correct 2 ms 932 KB Output is correct
11 Correct 590 ms 736 KB Output is correct
12 Correct 490 ms 992 KB Output is correct
13 Correct 496 ms 1188 KB Output is correct
14 Correct 489 ms 876 KB Output is correct
15 Correct 55 ms 924 KB Output is correct
16 Correct 79 ms 736 KB Output is correct
17 Correct 102 ms 984 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 823 ms 736 KB Output is correct
2 Correct 619 ms 1108 KB Output is correct
3 Correct 642 ms 864 KB Output is correct
4 Correct 2 ms 964 KB Output is correct
5 Correct 4 ms 864 KB Output is correct
6 Correct 2 ms 736 KB Output is correct
7 Correct 615 ms 1108 KB Output is correct
8 Correct 1010 ms 924 KB Output is correct
9 Correct 712 ms 864 KB Output is correct
10 Correct 560 ms 1108 KB Output is correct
11 Correct 6 ms 864 KB Output is correct
12 Correct 5 ms 736 KB Output is correct
13 Correct 6 ms 932 KB Output is correct
14 Correct 5 ms 864 KB Output is correct
15 Correct 2 ms 924 KB Output is correct
16 Correct 469 ms 736 KB Output is correct
17 Correct 552 ms 992 KB Output is correct
18 Correct 630 ms 924 KB Output is correct
19 Correct 510 ms 924 KB Output is correct
20 Correct 511 ms 924 KB Output is correct

Subtask #5
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 598 ms 1176 KB Output is correct
2 Correct 513 ms 1044 KB Output is correct
3 Correct 854 ms 736 KB Output is correct
4 Correct 643 ms 992 KB Output is correct
5 Correct 644 ms 1108 KB Output is correct
6 Correct 460 ms 1048 KB Output is correct
7 Correct 443 ms 864 KB Output is correct
8 Correct 2 ms 964 KB Output is correct
9 Correct 4 ms 736 KB Output is correct
10 Correct 2 ms 736 KB Output is correct
11 Correct 490 ms 864 KB Output is correct
12 Correct 615 ms 864 KB Output is correct
13 Correct 1103 ms 924 KB Output is correct
14 Correct 855 ms 992 KB Output is correct
15 Correct 663 ms 864 KB Output is correct
16 Correct 528 ms 864 KB Output is correct
17 Correct 768 ms 864 KB Output is correct
18 Correct 582 ms 1188 KB Output is correct
19 Correct 540 ms 1300 KB Output is correct
20 Correct 459 ms 864 KB Output is correct
21 Correct 60 ms 924 KB Output is correct
22 Correct 87 ms 736 KB Output is correct
23 Correct 140 ms 992 KB Output is correct
24 Correct 7 ms 736 KB Output is correct
25 Correct 7 ms 736 KB Output is correct
26 Correct 3 ms 964 KB Output is correct
27 Correct 3 ms 932 KB Output is correct
28 Correct 2 ms 884 KB Output is correct
29 Correct 570 ms 1012 KB Output is correct
30 Correct 649 ms 924 KB Output is correct
31 Correct 686 ms 864 KB Output is correct
32 Correct 494 ms 1052 KB Output is correct
33 Correct 688 ms 932 KB Output is correct
34 Correct 449 ms 1064 KB Output is correct
35 Correct 507 ms 1036 KB Output is correct
36 Correct 446 ms 1044 KB Output is correct
37 Correct 443 ms 1164 KB Output is correct
38 Correct 513 ms 1380 KB Output is correct
39 Correct 583 ms 1100 KB Output is correct
40 Correct 588 ms 1080 KB Output is correct
41 Correct 561 ms 1212 KB Output is correct
42 Correct 58 ms 976 KB Output is correct
43 Correct 129 ms 864 KB Output is correct
44 Correct 126 ms 1096 KB Output is correct
45 Correct 165 ms 864 KB Output is correct
46 Correct 352 ms 1244 KB Output is correct
47 Correct 330 ms 1088 KB Output is correct
48 Correct 77 ms 992 KB Output is correct
49 Correct 66 ms 1120 KB Output is correct