oj.uz

Submission #962512

# Submission time Handle Problem Language Result Execution time Memory
962512 2024-04-13T17:54:44 Z alex_2008 Longest Trip (IOI23_longesttrip) C++17
85 / 100
 820 ms 1464 KB 
#include "longesttrip.h"
#include <vector>
#include <iostream>
#include <cmath>
#include <algorithm>
using namespace std;
const int N = 5e2 + 10;
bool used[N];
vector <int> G[N];
vector <int> cur;
bool solved = false;
int f(int v) {
	int cnt = 0;
	for (auto it : G[v]) {
		if (!used[it]) ++cnt;
	}
	return cnt;
}
void dfs(int v, int n) {
	if (solved) return;
	used[v] = true;
	cur.push_back(v);
	if ((int)cur.size() == n) {
		solved = true;
		return;
	}
	int mn_deg = 1000, w = -1;
	for (auto it : G[v]) {
		if (!used[it]) {
			int q = f(it);
			if (q < mn_deg) {
				mn_deg = q;
				w = it;
			}
		}
	}
	if (w != -1) {
		dfs(w, n);
	}
}
bool find_edge(int a, int b) {
	return are_connected({ a }, { b });
}
vector <int> longest_trip(int n, int d) {
	if (d == 3) {
		vector <int> w(n);
		for (int i = 0; i < n; i++) {
			w[i] = i;
		}
		return w;
	}
	if (d == 2) {
		solved = false;
		for (int i = 0; i < n; i++) {
			G[i].clear();
		}
		for (int i = 0; i < n; i++) {
			for (int j = 0; j < i; j++) {
				vector <int> v1, v2;
				v1.push_back(i);
				v2.push_back(j);
				if (are_connected(v1, v2)) {
					G[i].push_back(j);
					G[j].push_back(i);
				}
			}
		}
		for (int i = 0; i < n; i++) {
			for (int j = 0; j < n; j++) {
				used[j] = false;
			}
			dfs(i, n);
			vector <int> ret = cur;
			cur.clear();
			if (solved) {
				return ret;
			}
		}
	}
	vector <int> p1, p2;
	p1.push_back(0);
	p2.push_back(1);
	for (int i = 2; i < n; i++) {
		if (find_edge(p1.back(), i)) {
			p1.push_back(i);
		}
		else if (find_edge(p2.back(), i)) {
			p2.push_back(i);
		}
		else {
			while (!p2.empty()) {
				p1.push_back(p2.back()); 
				p2.pop_back();
			}
			p2.push_back(i);
		}
	}
	if (find_edge(p1[0], p2[0])) {
		vector <int> ans;
		reverse(p1.begin(), p1.end());
		for (auto& it : p1) {
			ans.push_back(it);
		}
		for (auto& it : p2) {
			ans.push_back(it);
		}
		return ans;
	}
	if (find_edge(p1[0], p2.back())) {
		vector <int> ans;
		reverse(p1.begin(), p1.end());
		reverse(p2.begin(), p2.end());
		for (auto& it : p1) {
			ans.push_back(it);
		}
		for (auto& it : p2) {
			ans.push_back(it);
		}
		return ans;
	}
	if (find_edge(p1.back(), p2[0])) {
		vector <int> ans;
		for (auto& it : p1) {
			ans.push_back(it);
		}
		for (auto& it : p2) {
			ans.push_back(it);
		}
		return ans;
	}
	if (find_edge(p1.back(), p2.back())) {
		vector <int> ans;
		reverse(p2.begin(), p2.end());
		for (auto& it : p1) {
			ans.push_back(it);
		}
		for (auto& it : p2) {
			ans.push_back(it);
		}
		return ans;
	}
	if (!are_connected(p1, p2)) {
		if ((int)p1.size() > (int)p2.size()) {
			return p1;
		}
		return p2;
	}
	int l = 0, r = (int)p1.size() - 1, ans = -1;
	while (l <= r) {
		int mid = (l + r) / 2;
		vector <int> w;
		for (int i = mid; i < (int)p1.size(); i++) {
			w.push_back(p1[i]);
		}
		if (are_connected(w, p2)) {
			ans = mid;
			l = mid + 1;
		}
		else r = mid - 1;
	}
	int vert1 = ans;
	l = 0; r = (int)p2.size() - 1; ans = -1;
	while (l <= r) {
		int mid = (l + r) / 2;
		vector <int> w;
		for (int i = mid; i < (int)p2.size(); i++) {
			w.push_back(p2[i]);
		}
		if (are_connected({ p1[vert1] }, w)) {
			ans = mid;
			l = mid + 1;
		}
		else r = mid - 1;
	}
	int vert2 = ans;
	vector <int> final_ans;
	for (int i = vert1 + 1; i < (int)p1.size(); i++) {
		final_ans.push_back(p1[i]);
	}
	for (int i = 0; i <= vert1; i++) {
		final_ans.push_back(p1[i]);
	}
	for (int i = vert2; i < (int)p2.size(); i++) {
		final_ans.push_back(p2[i]);
	}
	for (int i = 0; i < vert2; i++) {
		final_ans.push_back(p2[i]);
	}
	return final_ans;
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 344 KB Output is correct
2 Correct 22 ms 344 KB Output is correct
3 Correct 124 ms 852 KB Output is correct
4 Correct 387 ms 1456 KB Output is correct
5 Correct 820 ms 1440 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 25 ms 344 KB Output is correct
8 Correct 135 ms 856 KB Output is correct
9 Correct 287 ms 1116 KB Output is correct
10 Correct 782 ms 1184 KB Output is correct
11 Correct 782 ms 1000 KB Output is correct
12 Correct 798 ms 1464 KB Output is correct
13 Correct 809 ms 1240 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 5 ms 344 KB Output is correct
6 Correct 9 ms 596 KB Output is correct
7 Correct 7 ms 344 KB Output is correct
8 Correct 4 ms 344 KB Output is correct
9 Correct 5 ms 344 KB Output is correct
10 Correct 4 ms 344 KB Output is correct
11 Correct 4 ms 344 KB Output is correct
12 Correct 5 ms 344 KB Output is correct
13 Correct 5 ms 344 KB Output is correct
14 Correct 12 ms 344 KB Output is correct
15 Correct 14 ms 344 KB Output is correct
16 Correct 9 ms 344 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 6 ms 344 KB Output is correct
19 Correct 6 ms 448 KB Output is correct
20 Correct 5 ms 344 KB Output is correct
21 Correct 5 ms 344 KB Output is correct
22 Correct 6 ms 600 KB Output is correct
23 Correct 7 ms 344 KB Output is correct
24 Correct 6 ms 452 KB Output is correct
25 Correct 10 ms 344 KB Output is correct
26 Correct 13 ms 344 KB Output is correct
27 Correct 9 ms 344 KB Output is correct
28 Correct 9 ms 344 KB Output is correct
29 Correct 7 ms 340 KB Output is correct
30 Correct 5 ms 596 KB Output is correct
31 Correct 6 ms 344 KB Output is correct
32 Correct 7 ms 344 KB Output is correct
33 Correct 6 ms 344 KB Output is correct
34 Correct 5 ms 344 KB Output is correct
35 Correct 6 ms 596 KB Output is correct
36 Correct 6 ms 600 KB Output is correct
37 Correct 5 ms 344 KB Output is correct
38 Correct 6 ms 600 KB Output is correct
39 Correct 6 ms 344 KB Output is correct
40 Correct 9 ms 600 KB Output is correct
41 Correct 7 ms 600 KB Output is correct
42 Correct 9 ms 344 KB Output is correct
43 Correct 8 ms 344 KB Output is correct
44 Correct 8 ms 344 KB Output is correct
45 Correct 7 ms 344 KB Output is correct
46 Correct 9 ms 344 KB Output is correct
47 Correct 9 ms 344 KB Output is correct
48 Correct 12 ms 356 KB Output is correct
49 Correct 11 ms 344 KB Output is correct
50 Correct 6 ms 448 KB Output is correct
51 Correct 9 ms 444 KB Output is correct
52 Correct 8 ms 344 KB Output is correct
53 Correct 6 ms 344 KB Output is correct
54 Correct 6 ms 444 KB Output is correct
55 Correct 6 ms 344 KB Output is correct
56 Correct 5 ms 460 KB Output is correct
57 Correct 6 ms 456 KB Output is correct
58 Correct 8 ms 600 KB Output is correct
59 Correct 7 ms 700 KB Output is correct
60 Correct 9 ms 700 KB Output is correct
61 Correct 7 ms 600 KB Output is correct
62 Correct 8 ms 456 KB Output is correct
63 Correct 8 ms 452 KB Output is correct
64 Correct 10 ms 600 KB Output is correct

Subtask #4
45.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 7 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 5 ms 344 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 4 ms 344 KB Output is correct
9 Correct 5 ms 344 KB Output is correct
10 Correct 6 ms 600 KB Output is correct
11 Correct 4 ms 344 KB Output is correct
12 Correct 5 ms 344 KB Output is correct
13 Correct 5 ms 600 KB Output is correct
14 Correct 13 ms 344 KB Output is correct
15 Correct 11 ms 344 KB Output is correct
16 Correct 8 ms 344 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 6 ms 344 KB Output is correct
19 Correct 6 ms 344 KB Output is correct
20 Correct 5 ms 344 KB Output is correct
21 Correct 11 ms 344 KB Output is correct
22 Correct 13 ms 344 KB Output is correct
23 Correct 8 ms 344 KB Output is correct
24 Correct 9 ms 344 KB Output is correct
25 Correct 7 ms 344 KB Output is correct
26 Correct 5 ms 344 KB Output is correct
27 Correct 6 ms 344 KB Output is correct
28 Correct 8 ms 344 KB Output is correct
29 Correct 5 ms 600 KB Output is correct
30 Correct 5 ms 344 KB Output is correct
31 Correct 5 ms 344 KB Output is correct
32 Correct 9 ms 344 KB Output is correct
33 Correct 8 ms 344 KB Output is correct
34 Correct 7 ms 344 KB Output is correct
35 Correct 9 ms 344 KB Output is correct
36 Correct 8 ms 344 KB Output is correct
37 Correct 5 ms 448 KB Output is correct
38 Correct 8 ms 448 KB Output is correct
39 Correct 8 ms 344 KB Output is correct
40 Correct 5 ms 344 KB Output is correct
41 Correct 6 ms 448 KB Output is correct
42 Correct 6 ms 344 KB Output is correct
43 Correct 5 ms 344 KB Output is correct
44 Correct 5 ms 344 KB Output is correct
45 Correct 5 ms 608 KB Output is correct
46 Correct 5 ms 344 KB Output is correct
47 Correct 5 ms 344 KB Output is correct
48 Correct 5 ms 444 KB Output is correct
49 Correct 7 ms 344 KB Output is correct
50 Correct 7 ms 600 KB Output is correct
51 Partially correct 7 ms 344 KB Output is partially correct
52 Correct 8 ms 600 KB Output is correct
53 Correct 6 ms 600 KB Output is correct
54 Correct 7 ms 344 KB Output is correct
55 Correct 7 ms 344 KB Output is correct
56 Correct 5 ms 344 KB Output is correct
57 Partially correct 7 ms 340 KB Output is partially correct
58 Partially correct 7 ms 444 KB Output is partially correct
59 Partially correct 7 ms 600 KB Output is partially correct
60 Correct 8 ms 344 KB Output is correct
61 Correct 8 ms 448 KB Output is correct
62 Correct 7 ms 452 KB Output is correct
63 Partially correct 7 ms 456 KB Output is partially correct
64 Partially correct 8 ms 600 KB Output is partially correct
65 Partially correct 7 ms 452 KB Output is partially correct
66 Partially correct 8 ms 604 KB Output is partially correct
67 Partially correct 7 ms 600 KB Output is partially correct
68 Partially correct 8 ms 600 KB Output is partially correct
69 Partially correct 8 ms 600 KB Output is partially correct
70 Partially correct 9 ms 452 KB Output is partially correct
71 Correct 5 ms 452 KB Output is correct
72 Partially correct 7 ms 452 KB Output is partially correct
73 Partially correct 9 ms 604 KB Output is partially correct
74 Partially correct 8 ms 600 KB Output is partially correct
75 Partially correct 7 ms 600 KB Output is partially correct
76 Partially correct 8 ms 604 KB Output is partially correct
77 Correct 5 ms 452 KB Output is correct
78 Partially correct 7 ms 456 KB Output is partially correct
79 Correct 7 ms 452 KB Output is correct
80 Partially correct 8 ms 856 KB Output is partially correct
81 Partially correct 8 ms 448 KB Output is partially correct
82 Partially correct 8 ms 608 KB Output is partially correct