#include <bits/stdc++.h>
#include "longesttrip.h"
using namespace std;
optional<int> find_edge_between(vector<int> s, int v) {
if (!are_connected(s, {v})) return nullopt;
vector<int> current = s;
while (current.size() > 1) {
int hs = current.size() / 2;
vector<int> h1(begin(current), begin(current) + hs), h2(begin(current) + hs, end(current));
if (are_connected(h1, {v})) current = h1;
else current = h2;
}
return current[0];
}
optional<pair<int, int>> find_edge_between(vector<int> s1, vector<int> s2) {
if (!are_connected(s1, s2)) return nullopt;
vector<int> current = s1;
while (current.size() > 1) {
int hs = current.size() / 2;
vector<int> h1(begin(current), begin(current) + hs), h2(begin(current) + hs, end(current));
if (are_connected(h1, s2)) current = h1;
else current = h2;
}
return make_pair(current[0], find_edge_between(s2, current[0]).value());
}
std::vector<int> longest_trip(int N, int D) {
deque<int> p1{0}, p2;
for (int i = 1; i < N; ++i) {
if (are_connected({p1.back()}, {i})) {
if (!p2.empty() && are_connected({i}, {p2.front()})) {
p1.push_back(i);
p1.insert(end(p1), begin(p2), end(p2));
p2.clear();
} else {
p1.push_back(i);
}
} else if (!p2.empty()) {
p2.push_front(i);
} else {
p2.push_back(i);
}
/*
cout << "p1: ";
for (int v : p1) cout << v;
cout << endl;
cout << "p2: ";
for (int v : p2) cout << v;
cout << endl;
*/
}
vector<int> fp1(p1.begin(), p1.end()), fp2(p2.begin(), p2.end());
if (fp1.size() == N) return fp1;
if (fp2.size() > 1 && !are_connected({fp2.front()}, {fp2.back()})) {
vector<int> ans = fp1;
reverse(begin(fp2), end(fp2));
ans.insert(end(ans), begin(fp2), end(fp2));
return ans;
}
if (fp1.size() > 1 && !are_connected({fp1.front()}, {fp1.back()})) {
reverse(begin(fp2), end(fp2));
vector<int> ans = fp2;
ans.insert(end(ans), begin(fp1), end(fp1));
return ans;
}
auto bridge = find_edge_between(fp1, fp2);
if (!bridge) {
return fp1.size() > fp2.size() ? fp1 : fp2;
}
auto left_end_iter = find(begin(fp2), end(fp2), bridge->second);
rotate(begin(fp2), left_end_iter, end(fp2));
auto right_end_iter = find(begin(fp1), end(fp1), bridge->first);
rotate(begin(fp1), right_end_iter, end(fp1));
vector<int> ans = fp2;
reverse(begin(ans), end(ans));
ans.insert(end(ans), begin(fp1), end(fp1));
return ans;
}
Compilation message
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:56:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
56 | if (fp1.size() == N) return fp1;
| ~~~~~~~~~~~^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
2 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 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 |
7 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 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 |
7 ms |
344 KB |
Output is correct |
| 5 |
Correct |
7 ms |
344 KB |
Output is correct |
| 6 |
Correct |
7 ms |
344 KB |
Output is correct |
| 7 |
Correct |
5 ms |
344 KB |
Output is correct |
| 8 |
Correct |
5 ms |
344 KB |
Output is correct |
| 9 |
Correct |
5 ms |
344 KB |
Output is correct |
| 10 |
Correct |
5 ms |
344 KB |
Output is correct |
| 11 |
Correct |
5 ms |
344 KB |
Output is correct |
| 12 |
Correct |
5 ms |
344 KB |
Output is correct |
| 13 |
Correct |
4 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
344 KB |
Output is correct |
| 2 |
Correct |
4 ms |
344 KB |
Output is correct |
| 3 |
Correct |
4 ms |
344 KB |
Output is correct |
| 4 |
Correct |
6 ms |
344 KB |
Output is correct |
| 5 |
Correct |
5 ms |
344 KB |
Output is correct |
| 6 |
Correct |
7 ms |
344 KB |
Output is correct |
| 7 |
Correct |
6 ms |
344 KB |
Output is correct |
| 8 |
Correct |
5 ms |
344 KB |
Output is correct |
| 9 |
Correct |
5 ms |
344 KB |
Output is correct |
| 10 |
Correct |
5 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 |
4 ms |
344 KB |
Output is correct |
| 14 |
Correct |
9 ms |
344 KB |
Output is correct |
| 15 |
Correct |
8 ms |
344 KB |
Output is correct |
| 16 |
Correct |
9 ms |
344 KB |
Output is correct |
| 17 |
Correct |
10 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 |
6 ms |
428 KB |
Output is correct |
| 21 |
Correct |
5 ms |
344 KB |
Output is correct |
| 22 |
Correct |
6 ms |
344 KB |
Output is correct |
| 23 |
Correct |
5 ms |
436 KB |
Output is correct |
| 24 |
Correct |
5 ms |
344 KB |
Output is correct |
| 25 |
Correct |
7 ms |
344 KB |
Output is correct |
| 26 |
Correct |
10 ms |
344 KB |
Output is correct |
| 27 |
Correct |
8 ms |
344 KB |
Output is correct |
| 28 |
Correct |
8 ms |
344 KB |
Output is correct |
| 29 |
Correct |
5 ms |
344 KB |
Output is correct |
| 30 |
Correct |
11 ms |
344 KB |
Output is correct |
| 31 |
Correct |
8 ms |
344 KB |
Output is correct |
| 32 |
Correct |
14 ms |
344 KB |
Output is correct |
| 33 |
Correct |
8 ms |
344 KB |
Output is correct |
| 34 |
Correct |
7 ms |
600 KB |
Output is correct |
| 35 |
Correct |
7 ms |
344 KB |
Output is correct |
| 36 |
Correct |
8 ms |
344 KB |
Output is correct |
| 37 |
Correct |
6 ms |
344 KB |
Output is correct |
| 38 |
Correct |
9 ms |
344 KB |
Output is correct |
| 39 |
Correct |
8 ms |
344 KB |
Output is correct |
| 40 |
Correct |
5 ms |
344 KB |
Output is correct |
| 41 |
Correct |
8 ms |
344 KB |
Output is correct |
| 42 |
Correct |
11 ms |
344 KB |
Output is correct |
| 43 |
Correct |
5 ms |
344 KB |
Output is correct |
| 44 |
Correct |
6 ms |
344 KB |
Output is correct |
| 45 |
Correct |
8 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 |
10 ms |
344 KB |
Output is correct |
| 49 |
Correct |
11 ms |
344 KB |
Output is correct |
| 50 |
Correct |
9 ms |
344 KB |
Output is correct |
| 51 |
Correct |
10 ms |
344 KB |
Output is correct |
| 52 |
Correct |
8 ms |
344 KB |
Output is correct |
| 53 |
Correct |
7 ms |
440 KB |
Output is correct |
| 54 |
Correct |
10 ms |
344 KB |
Output is correct |
| 55 |
Correct |
8 ms |
344 KB |
Output is correct |
| 56 |
Correct |
5 ms |
344 KB |
Output is correct |
| 57 |
Correct |
7 ms |
344 KB |
Output is correct |
| 58 |
Correct |
12 ms |
344 KB |
Output is correct |
| 59 |
Correct |
10 ms |
440 KB |
Output is correct |
| 60 |
Correct |
11 ms |
344 KB |
Output is correct |
| 61 |
Correct |
6 ms |
344 KB |
Output is correct |
| 62 |
Correct |
10 ms |
596 KB |
Output is correct |
| 63 |
Correct |
8 ms |
444 KB |
Output is correct |
| 64 |
Correct |
7 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
344 KB |
Output is correct |
| 2 |
Correct |
5 ms |
344 KB |
Output is correct |
| 3 |
Correct |
4 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 |
7 ms |
356 KB |
Output is correct |
| 7 |
Correct |
5 ms |
344 KB |
Output is correct |
| 8 |
Correct |
4 ms |
344 KB |
Output is correct |
| 9 |
Correct |
4 ms |
344 KB |
Output is correct |
| 10 |
Correct |
4 ms |
344 KB |
Output is correct |
| 11 |
Correct |
5 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 |
9 ms |
344 KB |
Output is correct |
| 15 |
Correct |
8 ms |
344 KB |
Output is correct |
| 16 |
Correct |
8 ms |
344 KB |
Output is correct |
| 17 |
Correct |
7 ms |
344 KB |
Output is correct |
| 18 |
Correct |
7 ms |
436 KB |
Output is correct |
| 19 |
Correct |
4 ms |
344 KB |
Output is correct |
| 20 |
Correct |
5 ms |
344 KB |
Output is correct |
| 21 |
Correct |
7 ms |
344 KB |
Output is correct |
| 22 |
Correct |
8 ms |
344 KB |
Output is correct |
| 23 |
Correct |
5 ms |
340 KB |
Output is correct |
| 24 |
Correct |
7 ms |
440 KB |
Output is correct |
| 25 |
Correct |
8 ms |
432 KB |
Output is correct |
| 26 |
Correct |
6 ms |
344 KB |
Output is correct |
| 27 |
Correct |
5 ms |
344 KB |
Output is correct |
| 28 |
Correct |
6 ms |
344 KB |
Output is correct |
| 29 |
Correct |
8 ms |
344 KB |
Output is correct |
| 30 |
Correct |
8 ms |
344 KB |
Output is correct |
| 31 |
Correct |
8 ms |
344 KB |
Output is correct |
| 32 |
Correct |
7 ms |
344 KB |
Output is correct |
| 33 |
Correct |
7 ms |
344 KB |
Output is correct |
| 34 |
Correct |
9 ms |
344 KB |
Output is correct |
| 35 |
Correct |
7 ms |
344 KB |
Output is correct |
| 36 |
Correct |
7 ms |
344 KB |
Output is correct |
| 37 |
Correct |
7 ms |
344 KB |
Output is correct |
| 38 |
Correct |
5 ms |
340 KB |
Output is correct |
| 39 |
Correct |
7 ms |
344 KB |
Output is correct |
| 40 |
Correct |
6 ms |
344 KB |
Output is correct |
| 41 |
Correct |
8 ms |
440 KB |
Output is correct |
| 42 |
Correct |
8 ms |
344 KB |
Output is correct |
| 43 |
Correct |
5 ms |
344 KB |
Output is correct |
| 44 |
Correct |
8 ms |
432 KB |
Output is correct |
| 45 |
Correct |
5 ms |
344 KB |
Output is correct |
| 46 |
Correct |
8 ms |
344 KB |
Output is correct |
| 47 |
Partially correct |
5 ms |
344 KB |
Output is partially correct |
| 48 |
Partially correct |
8 ms |
440 KB |
Output is partially correct |
| 49 |
Partially correct |
9 ms |
344 KB |
Output is partially correct |
| 50 |
Partially correct |
5 ms |
344 KB |
Output is partially correct |
| 51 |
Partially correct |
6 ms |
344 KB |
Output is partially correct |
| 52 |
Correct |
8 ms |
344 KB |
Output is correct |
| 53 |
Correct |
8 ms |
344 KB |
Output is correct |
| 54 |
Correct |
5 ms |
344 KB |
Output is correct |
| 55 |
Correct |
7 ms |
344 KB |
Output is correct |
| 56 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 57 |
Partially correct |
7 ms |
344 KB |
Output is partially correct |
| 58 |
Partially correct |
7 ms |
344 KB |
Output is partially correct |
| 59 |
Partially correct |
9 ms |
344 KB |
Output is partially correct |
| 60 |
Correct |
6 ms |
340 KB |
Output is correct |
| 61 |
Correct |
9 ms |
344 KB |
Output is correct |
| 62 |
Correct |
8 ms |
440 KB |
Output is correct |
| 63 |
Partially correct |
7 ms |
344 KB |
Output is partially correct |
| 64 |
Partially correct |
9 ms |
344 KB |
Output is partially correct |
| 65 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 66 |
Partially correct |
11 ms |
432 KB |
Output is partially correct |
| 67 |
Correct |
6 ms |
344 KB |
Output is correct |
| 68 |
Correct |
9 ms |
344 KB |
Output is correct |
| 69 |
Partially correct |
10 ms |
596 KB |
Output is partially correct |
| 70 |
Partially correct |
9 ms |
444 KB |
Output is partially correct |
| 71 |
Partially correct |
13 ms |
600 KB |
Output is partially correct |
| 72 |
Partially correct |
10 ms |
344 KB |
Output is partially correct |
| 73 |
Partially correct |
7 ms |
444 KB |
Output is partially correct |
| 74 |
Partially correct |
10 ms |
344 KB |
Output is partially correct |
| 75 |
Correct |
10 ms |
600 KB |
Output is correct |
| 76 |
Correct |
8 ms |
344 KB |
Output is correct |
| 77 |
Partially correct |
10 ms |
428 KB |
Output is partially correct |
| 78 |
Partially correct |
8 ms |
440 KB |
Output is partially correct |
| 79 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 80 |
Partially correct |
8 ms |
440 KB |
Output is partially correct |
| 81 |
Correct |
11 ms |
344 KB |
Output is correct |
| 82 |
Correct |
7 ms |
340 KB |
Output is correct |
