oj.uz

Submission #614545

# Submission time Handle Problem Language Result Execution time Memory
614545 2022-07-31T03:48:56 Z penguinhacker Stations (IOI20_stations) C++17
100 / 100
 855 ms 900 KB 
#include "stations.h"
#include <bits/stdc++.h>
using namespace std;

const int mxN=1000;
int n, tin[mxN], tout[mxN], t, d[mxN];
vector<int> adj[mxN];

void dfs(int u=0, int p=-1) {
	tin[u]=t++;
	for (int v : adj[u])
		if (v!=p) {
			d[v]=d[u]+1;
			dfs(v, u);
		}
	tout[u]=t++;
}

vector<int> label(int _n, int _k, vector<int> u, vector<int> v) {
	n=_n;
	for (int i=0; i<n; ++i)
		adj[i].clear();
	for (int i=0; i<n-1; i++) {
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}
	dfs();
	vector<int> inds(n), labels(n);
	iota(inds.begin(), inds.end(), 0);
	sort(inds.begin(), inds.end(), [](int a, int b) { return (d[a]%2?tout[a]:tin[a])<(d[b]%2?tout[b]:tin[b]); });
	for (int i=0; i<n; ++i)
		labels[inds[i]]=i;
	/*for (int i : labels)
		cout << i << " ";
	cout << endl;*/
	return labels;
}

int find_next_station(int s, int t, vector<int> c) {
	if (c.back()>s) { // s is tin[s]
		if (!s||s<=t&&t<=c.end()[-2]) { // t is in subtree of s
			for (int i=0; i+(s>0)<c.size(); ++i)
				if (t<=c[i])
					return c[i];
			assert(0);
		} else
			return c.back();
	} else {
		if (c.size()>1&&c[1]<=t&&t<=s) { // again in subtree
			for (int i=c.size()-1; i; --i)
				if (t>=c[i])
					return c[i];
			assert(0);
		} else
			return c[0];
	}
}

Compilation message

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:41:15: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   41 |   if (!s||s<=t&&t<=c.end()[-2]) { // t is in subtree of s
stations.cpp:42:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |    for (int i=0; i+(s>0)<c.size(); ++i)
      |                  ~~~~~~~^~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 587 ms 516 KB Output is correct
2 Correct 445 ms 644 KB Output is correct
3 Correct 786 ms 524 KB Output is correct
4 Correct 674 ms 528 KB Output is correct
5 Correct 519 ms 416 KB Output is correct
6 Correct 555 ms 532 KB Output is correct
7 Correct 366 ms 508 KB Output is correct
8 Correct 2 ms 620 KB Output is correct
9 Correct 3 ms 620 KB Output is correct
10 Correct 1 ms 620 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 405 ms 544 KB Output is correct
2 Correct 480 ms 560 KB Output is correct
3 Correct 852 ms 532 KB Output is correct
4 Correct 654 ms 628 KB Output is correct
5 Correct 743 ms 544 KB Output is correct
6 Correct 386 ms 528 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 638 ms 784 KB Output is correct
2 Correct 448 ms 644 KB Output is correct
3 Correct 855 ms 576 KB Output is correct
4 Correct 649 ms 532 KB Output is correct
5 Correct 498 ms 512 KB Output is correct
6 Correct 337 ms 640 KB Output is correct
7 Correct 447 ms 528 KB Output is correct
8 Correct 1 ms 488 KB Output is correct
9 Correct 3 ms 628 KB Output is correct
10 Correct 1 ms 620 KB Output is correct
11 Correct 588 ms 528 KB Output is correct
12 Correct 435 ms 784 KB Output is correct
13 Correct 441 ms 808 KB Output is correct
14 Correct 455 ms 660 KB Output is correct
15 Correct 51 ms 560 KB Output is correct
16 Correct 67 ms 584 KB Output is correct
17 Correct 117 ms 676 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 750 ms 532 KB Output is correct
2 Correct 654 ms 524 KB Output is correct
3 Correct 583 ms 660 KB Output is correct
4 Correct 2 ms 620 KB Output is correct
5 Correct 4 ms 492 KB Output is correct
6 Correct 0 ms 500 KB Output is correct
7 Correct 582 ms 416 KB Output is correct
8 Correct 667 ms 596 KB Output is correct
9 Correct 589 ms 548 KB Output is correct
10 Correct 530 ms 544 KB Output is correct
11 Correct 4 ms 488 KB Output is correct
12 Correct 5 ms 628 KB Output is correct
13 Correct 5 ms 620 KB Output is correct
14 Correct 3 ms 488 KB Output is correct
15 Correct 1 ms 628 KB Output is correct
16 Correct 511 ms 416 KB Output is correct
17 Correct 476 ms 416 KB Output is correct
18 Correct 360 ms 544 KB Output is correct
19 Correct 445 ms 548 KB Output is correct
20 Correct 368 ms 524 KB Output is correct

Subtask #5
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 440 ms 656 KB Output is correct
2 Correct 410 ms 656 KB Output is correct
3 Correct 763 ms 516 KB Output is correct
4 Correct 651 ms 524 KB Output is correct
5 Correct 564 ms 528 KB Output is correct
6 Correct 452 ms 656 KB Output is correct
7 Correct 420 ms 544 KB Output is correct
8 Correct 2 ms 620 KB Output is correct
9 Correct 4 ms 624 KB Output is correct
10 Correct 0 ms 620 KB Output is correct
11 Correct 446 ms 588 KB Output is correct
12 Correct 514 ms 548 KB Output is correct
13 Correct 786 ms 524 KB Output is correct
14 Correct 588 ms 536 KB Output is correct
15 Correct 531 ms 528 KB Output is correct
16 Correct 446 ms 528 KB Output is correct
17 Correct 608 ms 528 KB Output is correct
18 Correct 426 ms 632 KB Output is correct
19 Correct 488 ms 784 KB Output is correct
20 Correct 430 ms 520 KB Output is correct
21 Correct 57 ms 620 KB Output is correct
22 Correct 60 ms 736 KB Output is correct
23 Correct 107 ms 672 KB Output is correct
24 Correct 4 ms 620 KB Output is correct
25 Correct 5 ms 620 KB Output is correct
26 Correct 2 ms 492 KB Output is correct
27 Correct 2 ms 628 KB Output is correct
28 Correct 1 ms 620 KB Output is correct
29 Correct 527 ms 544 KB Output is correct
30 Correct 455 ms 416 KB Output is correct
31 Correct 473 ms 528 KB Output is correct
32 Correct 486 ms 420 KB Output is correct
33 Correct 528 ms 528 KB Output is correct
34 Correct 248 ms 524 KB Output is correct
35 Correct 373 ms 544 KB Output is correct
36 Correct 454 ms 748 KB Output is correct
37 Correct 481 ms 604 KB Output is correct
38 Correct 490 ms 756 KB Output is correct
39 Correct 483 ms 656 KB Output is correct
40 Correct 484 ms 640 KB Output is correct
41 Correct 477 ms 644 KB Output is correct
42 Correct 64 ms 676 KB Output is correct
43 Correct 104 ms 696 KB Output is correct
44 Correct 105 ms 544 KB Output is correct
45 Correct 173 ms 536 KB Output is correct
46 Correct 324 ms 608 KB Output is correct
47 Correct 317 ms 528 KB Output is correct
48 Correct 61 ms 712 KB Output is correct
49 Correct 61 ms 900 KB Output is correct