oj.uz

Submission #841031

# Submission time Handle Problem Language Result Execution time Memory
841031 2023-09-01T05:59:46 Z jhwest2 Longest Trip (IOI23_longesttrip) C++17
15 / 100
 18 ms 304 KB 
#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;

pair<int, int> find_edge(vector<int> p1, vector<int> p2) {
	if (p1.size() == 1 && p2.size() == 1) {
		return {p1[0], p2[0]};
	}
	if (p1.size() == 1) {
		int m = (int)p2.size() / 2;
		vector<int> left = vector<int>(p2.begin(), p2.begin() + m);
		vector<int> right = vector<int>(p2.begin() + m, p2.end());
		if (are_connected(p1, left)) 
			return find_edge(p1, left);
		else 
			return find_edge(p1, right);
	}
	else {
		int m = (int)p1.size() / 2;
		vector<int> left = vector<int>(p1.begin(), p1.begin() + m);
		vector<int> right = vector<int>(p1.begin() + m, p1.end());
		if (are_connected(left, p2))
			return find_edge(left, p2);
		else
			return find_edge(right, p2);
	}
}
vector<int> longest_trip(int N, int D)
{
	if (D == 3) {
		vector<int> res(N);
		iota(res.begin(), res.end(), 0);
		return res;
	}
	if (D == 2) {
		deque<int> dq = {0};
		vector<bool> chk(N);
		for (int i = 1; i < N; i++) {
			if (are_connected({0}, {i})) {
				dq.push_back(i);
				chk[i] = true;
				break;
			}
		}
		for (int i = 1; i < N; i++) {
			if (chk[i]) continue;
			if (are_connected({i}, {dq.back()}))
				dq.push_back(i);
			else
				dq.push_front(i);
		}
		return vector<int>(dq.begin(), dq.end());
	}
	vector<int> path = {0};
	vector<int> clique;
	int p = 1;
	while (true) {
		if (!clique.empty() && are_connected({path.back()}, clique)) {
			int s = -1;
			for (int x : clique) {
				if (are_connected({x}, {path.back()})) {
					s = x;
					break;
				}
			}
			path.push_back(s);
			for (int x : clique) if (s != x) {
				path.push_back(x);
			}
			clique.clear();
		}
		else {
			while (p < N && !are_connected({path.back()}, {p})) {
				clique.push_back(p++);
			}
			if (p == N) break;
			path.push_back(p++);
		}
	}
	if (clique.empty() || !are_connected(path, clique)) {
		if (path.size() < clique.size())
			return clique;
		else
			return path;
	}
	if (!clique.empty() && are_connected({path[0]}, clique)) {
		auto [u, v] = find_edge({path[0]}, clique);
		vector<int> ans;
		for (int x : clique) if (x != v) ans.push_back(x);
		ans.push_back(v);
		for (int x : path) ans.push_back(x);
		return ans;
	}
	auto [u, v] = find_edge(path, clique);
	vector<int> ans;
	for (int x : clique) if (x != v) ans.push_back(x);
	ans.push_back(v);
	bool f = false;
	p = find(path.begin(), path.end(), u) - path.begin();
	for (int i = p; i < path.size(); i++) ans.push_back(path[i]);
	for (int i = 0; i < p; i++) ans.push_back(path[i]);
	return path;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:100:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  100 |  for (int i = p; i < path.size(); i++) ans.push_back(path[i]);
      |                  ~~^~~~~~~~~~~~~
longesttrip.cpp:98:7: warning: unused variable 'f' [-Wunused-variable]
   98 |  bool f = false;
      |       ^

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 3 ms 208 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 208 KB Output is correct
2 Correct 1 ms 208 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 208 KB Output is correct
2 Correct 10 ms 208 KB Output is correct
3 Correct 9 ms 208 KB Output is correct
4 Correct 6 ms 208 KB Output is correct
5 Correct 8 ms 208 KB Output is correct
6 Correct 10 ms 208 KB Output is correct
7 Correct 5 ms 208 KB Output is correct
8 Correct 7 ms 208 KB Output is correct
9 Correct 6 ms 208 KB Output is correct
10 Correct 9 ms 208 KB Output is correct
11 Correct 9 ms 300 KB Output is correct
12 Correct 9 ms 300 KB Output is correct
13 Correct 7 ms 208 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 208 KB Output is correct
2 Correct 6 ms 208 KB Output is correct
3 Correct 7 ms 208 KB Output is correct
4 Correct 7 ms 208 KB Output is correct
5 Correct 9 ms 296 KB Output is correct
6 Correct 7 ms 208 KB Output is correct
7 Correct 11 ms 208 KB Output is correct
8 Correct 8 ms 208 KB Output is correct
9 Correct 8 ms 208 KB Output is correct
10 Correct 9 ms 208 KB Output is correct
11 Correct 8 ms 208 KB Output is correct
12 Correct 9 ms 208 KB Output is correct
13 Correct 7 ms 208 KB Output is correct
14 Correct 13 ms 208 KB Output is correct
15 Correct 12 ms 208 KB Output is correct
16 Correct 14 ms 208 KB Output is correct
17 Correct 10 ms 208 KB Output is correct
18 Correct 7 ms 208 KB Output is correct
19 Correct 7 ms 208 KB Output is correct
20 Correct 10 ms 208 KB Output is correct
21 Correct 7 ms 208 KB Output is correct
22 Correct 8 ms 208 KB Output is correct
23 Correct 13 ms 300 KB Output is correct
24 Correct 7 ms 208 KB Output is correct
25 Correct 7 ms 208 KB Output is correct
26 Correct 13 ms 208 KB Output is correct
27 Correct 10 ms 208 KB Output is correct
28 Correct 7 ms 208 KB Output is correct
29 Correct 9 ms 208 KB Output is correct
30 Correct 15 ms 208 KB Output is correct
31 Correct 10 ms 296 KB Output is correct
32 Correct 9 ms 208 KB Output is correct
33 Correct 11 ms 208 KB Output is correct
34 Correct 7 ms 208 KB Output is correct
35 Correct 13 ms 208 KB Output is correct
36 Correct 11 ms 208 KB Output is correct
37 Correct 14 ms 208 KB Output is correct
38 Correct 18 ms 208 KB Output is correct
39 Correct 17 ms 208 KB Output is correct
40 Correct 17 ms 288 KB Output is correct
41 Correct 12 ms 304 KB Output is correct
42 Correct 17 ms 208 KB Output is correct
43 Correct 17 ms 304 KB Output is correct
44 Correct 15 ms 304 KB Output is correct
45 Correct 14 ms 208 KB Output is correct
46 Correct 9 ms 208 KB Output is correct
47 Correct 13 ms 208 KB Output is correct
48 Correct 12 ms 208 KB Output is correct
49 Correct 12 ms 256 KB Output is correct
50 Correct 10 ms 208 KB Output is correct
51 Incorrect 1 ms 296 KB Incorrect
52 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 208 KB Output is correct
2 Correct 9 ms 208 KB Output is correct
3 Correct 9 ms 208 KB Output is correct
4 Correct 9 ms 208 KB Output is correct
5 Correct 6 ms 208 KB Output is correct
6 Correct 15 ms 208 KB Output is correct
7 Correct 11 ms 208 KB Output is correct
8 Correct 9 ms 208 KB Output is correct
9 Correct 5 ms 208 KB Output is correct
10 Correct 8 ms 304 KB Output is correct
11 Correct 7 ms 208 KB Output is correct
12 Correct 5 ms 208 KB Output is correct
13 Correct 5 ms 208 KB Output is correct
14 Correct 8 ms 208 KB Output is correct
15 Correct 10 ms 208 KB Output is correct
16 Incorrect 1 ms 208 KB Incorrect
17 Halted 0 ms 0 KB -