#include <bits/stdc++.h>
#include "longesttrip.h"
using namespace std;
using ll = long long;
int n;
vector<int> longest_trip(int N, int D) {
n = N;
vector<int> p1, p2;
p1.push_back(0);
int st = 0;
for (int i = 1;i < n;i++) {
if (p2.empty()) {
if (are_connected({ p1.back() }, { i })) p1.push_back(i);
else p2.push_back(i), st = 0;
}
else {
if (st == 0) {
if (!are_connected({ p1.back(), i }, { p2.back() })) p1.push_back(i);
else p2.push_back(i), st = 1;
}
else if (st == 1) {
if (are_connected({ p2.back() }, { i })) p2.push_back(i);
else {
if (are_connected({ p1.back() }, { i })) {
p1.push_back(i), st = 1;
reverse(p2.begin(), p2.end());
}
else {
reverse(p2.begin(), p2.end());
for (auto& x : p2) p1.push_back(x);
p1.push_back(i);
p2.clear();
}
}
}
}
}
if (p1.size() > p2.size()) swap(p1, p2);
if ((int)p2.size() == n) return p2;
int l = 0, r = p1.size();
while (l < r) {
int mid = (l + r) / 2;
vector<int> t;
for (int j = 0;j <= mid;j++) t.push_back(p1[j]);
if (are_connected(t, p2)) r = mid;
else l = mid + 1;
}
if (l == (int)p1.size()) return p2;
if (are_connected({ p1.back() }, p2)) {
reverse(p1.begin(), p1.end());
}
else {
vector<int> p3;
for (int i = 0;i < (int)p1.size();i++) {
p3.push_back(p1[(i + l) % ((int)p1.size())]);
}
swap(p1, p3);
}
l = 0, r = p2.size() - 2;
while (l < r) {
int mid = (l + r) / 2;
vector<int> t;
for (int j = 0;j <= mid;j++) t.push_back(p2[j]);
if (are_connected(t, { p1.front() })) r = mid;
else l = mid + 1;
}
if (are_connected({ p1.front() }, { p2.back() })) {
vector<int> ans;
for (auto& x : p2) ans.push_back(x);
for (auto& x : p1) ans.push_back(x);
return ans;
}
else {
vector<int> p3;
for (int i = 0;i < (int)p2.size();i++) {
p3.push_back(p2[(i + l) % ((int)p2.size())]);
}
swap(p2, p3);
}
reverse(p2.begin(), p2.end());
vector<int> ans;
for (auto& x : p2) ans.push_back(x);
for (auto& x : p1) ans.push_back(x);
return ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
2 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
352 KB |
Output is correct |
| 2 |
Correct |
4 ms |
344 KB |
Output is correct |
| 3 |
Correct |
5 ms |
344 KB |
Output is correct |
| 4 |
Correct |
6 ms |
344 KB |
Output is correct |
| 5 |
Correct |
6 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 |
7 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 |
12 ms |
344 KB |
Output is correct |
| 7 |
Correct |
7 ms |
348 KB |
Output is correct |
| 8 |
Correct |
5 ms |
348 KB |
Output is correct |
| 9 |
Correct |
8 ms |
344 KB |
Output is correct |
| 10 |
Correct |
4 ms |
444 KB |
Output is correct |
| 11 |
Correct |
5 ms |
344 KB |
Output is correct |
| 12 |
Correct |
6 ms |
344 KB |
Output is correct |
| 13 |
Correct |
6 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
344 KB |
Output is correct |
| 2 |
Correct |
7 ms |
344 KB |
Output is correct |
| 3 |
Correct |
5 ms |
344 KB |
Output is correct |
| 4 |
Correct |
4 ms |
352 KB |
Output is correct |
| 5 |
Correct |
5 ms |
604 KB |
Output is correct |
| 6 |
Correct |
7 ms |
356 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 |
6 ms |
440 KB |
Output is correct |
| 11 |
Correct |
6 ms |
344 KB |
Output is correct |
| 12 |
Correct |
5 ms |
344 KB |
Output is correct |
| 13 |
Correct |
6 ms |
344 KB |
Output is correct |
| 14 |
Correct |
6 ms |
344 KB |
Output is correct |
| 15 |
Correct |
10 ms |
344 KB |
Output is correct |
| 16 |
Correct |
11 ms |
344 KB |
Output is correct |
| 17 |
Correct |
8 ms |
344 KB |
Output is correct |
| 18 |
Correct |
7 ms |
344 KB |
Output is correct |
| 19 |
Correct |
7 ms |
344 KB |
Output is correct |
| 20 |
Correct |
7 ms |
344 KB |
Output is correct |
| 21 |
Correct |
9 ms |
344 KB |
Output is correct |
| 22 |
Correct |
6 ms |
344 KB |
Output is correct |
| 23 |
Correct |
7 ms |
432 KB |
Output is correct |
| 24 |
Correct |
7 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 |
6 ms |
344 KB |
Output is correct |
| 28 |
Correct |
5 ms |
344 KB |
Output is correct |
| 29 |
Correct |
5 ms |
344 KB |
Output is correct |
| 30 |
Correct |
5 ms |
344 KB |
Output is correct |
| 31 |
Correct |
8 ms |
344 KB |
Output is correct |
| 32 |
Correct |
9 ms |
344 KB |
Output is correct |
| 33 |
Correct |
4 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 |
5 ms |
344 KB |
Output is correct |
| 37 |
Correct |
9 ms |
344 KB |
Output is correct |
| 38 |
Correct |
9 ms |
352 KB |
Output is correct |
| 39 |
Correct |
9 ms |
352 KB |
Output is correct |
| 40 |
Correct |
8 ms |
348 KB |
Output is correct |
| 41 |
Correct |
8 ms |
348 KB |
Output is correct |
| 42 |
Correct |
7 ms |
344 KB |
Output is correct |
| 43 |
Correct |
8 ms |
348 KB |
Output is correct |
| 44 |
Correct |
11 ms |
348 KB |
Output is correct |
| 45 |
Correct |
13 ms |
352 KB |
Output is correct |
| 46 |
Correct |
10 ms |
344 KB |
Output is correct |
| 47 |
Correct |
8 ms |
352 KB |
Output is correct |
| 48 |
Correct |
8 ms |
348 KB |
Output is correct |
| 49 |
Correct |
10 ms |
344 KB |
Output is correct |
| 50 |
Correct |
6 ms |
344 KB |
Output is correct |
| 51 |
Correct |
8 ms |
348 KB |
Output is correct |
| 52 |
Correct |
9 ms |
348 KB |
Output is correct |
| 53 |
Correct |
8 ms |
344 KB |
Output is correct |
| 54 |
Correct |
8 ms |
348 KB |
Output is correct |
| 55 |
Correct |
9 ms |
348 KB |
Output is correct |
| 56 |
Correct |
6 ms |
604 KB |
Output is correct |
| 57 |
Correct |
7 ms |
344 KB |
Output is correct |
| 58 |
Correct |
8 ms |
344 KB |
Output is correct |
| 59 |
Correct |
9 ms |
444 KB |
Output is correct |
| 60 |
Correct |
12 ms |
688 KB |
Output is correct |
| 61 |
Correct |
8 ms |
344 KB |
Output is correct |
| 62 |
Correct |
12 ms |
344 KB |
Output is correct |
| 63 |
Correct |
9 ms |
344 KB |
Output is correct |
| 64 |
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 |
6 ms |
344 KB |
Output is correct |
| 3 |
Correct |
5 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 |
8 ms |
344 KB |
Output is correct |
| 7 |
Correct |
7 ms |
344 KB |
Output is correct |
| 8 |
Correct |
7 ms |
344 KB |
Output is correct |
| 9 |
Correct |
4 ms |
340 KB |
Output is correct |
| 10 |
Correct |
6 ms |
344 KB |
Output is correct |
| 11 |
Correct |
5 ms |
344 KB |
Output is correct |
| 12 |
Correct |
6 ms |
344 KB |
Output is correct |
| 13 |
Correct |
6 ms |
344 KB |
Output is correct |
| 14 |
Correct |
7 ms |
344 KB |
Output is correct |
| 15 |
Correct |
7 ms |
344 KB |
Output is correct |
| 16 |
Correct |
9 ms |
344 KB |
Output is correct |
| 17 |
Correct |
7 ms |
344 KB |
Output is correct |
| 18 |
Correct |
7 ms |
344 KB |
Output is correct |
| 19 |
Correct |
6 ms |
344 KB |
Output is correct |
| 20 |
Correct |
7 ms |
344 KB |
Output is correct |
| 21 |
Correct |
8 ms |
344 KB |
Output is correct |
| 22 |
Correct |
7 ms |
344 KB |
Output is correct |
| 23 |
Correct |
4 ms |
344 KB |
Output is correct |
| 24 |
Correct |
6 ms |
344 KB |
Output is correct |
| 25 |
Correct |
6 ms |
344 KB |
Output is correct |
| 26 |
Correct |
5 ms |
344 KB |
Output is correct |
| 27 |
Correct |
8 ms |
344 KB |
Output is correct |
| 28 |
Correct |
7 ms |
344 KB |
Output is correct |
| 29 |
Correct |
6 ms |
344 KB |
Output is correct |
| 30 |
Correct |
7 ms |
344 KB |
Output is correct |
| 31 |
Correct |
11 ms |
344 KB |
Output is correct |
| 32 |
Correct |
12 ms |
340 KB |
Output is correct |
| 33 |
Correct |
7 ms |
344 KB |
Output is correct |
| 34 |
Correct |
8 ms |
344 KB |
Output is correct |
| 35 |
Correct |
12 ms |
344 KB |
Output is correct |
| 36 |
Correct |
13 ms |
344 KB |
Output is correct |
| 37 |
Correct |
6 ms |
344 KB |
Output is correct |
| 38 |
Correct |
6 ms |
344 KB |
Output is correct |
| 39 |
Correct |
8 ms |
344 KB |
Output is correct |
| 40 |
Correct |
6 ms |
344 KB |
Output is correct |
| 41 |
Correct |
11 ms |
344 KB |
Output is correct |
| 42 |
Correct |
7 ms |
600 KB |
Output is correct |
| 43 |
Correct |
9 ms |
600 KB |
Output is correct |
| 44 |
Correct |
7 ms |
344 KB |
Output is correct |
| 45 |
Correct |
5 ms |
344 KB |
Output is correct |
| 46 |
Correct |
9 ms |
344 KB |
Output is correct |
| 47 |
Correct |
5 ms |
344 KB |
Output is correct |
| 48 |
Partially correct |
9 ms |
344 KB |
Output is partially correct |
| 49 |
Partially correct |
9 ms |
340 KB |
Output is partially correct |
| 50 |
Partially correct |
11 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 |
9 ms |
436 KB |
Output is correct |
| 54 |
Correct |
8 ms |
344 KB |
Output is correct |
| 55 |
Correct |
8 ms |
344 KB |
Output is correct |
| 56 |
Partially correct |
11 ms |
344 KB |
Output is partially correct |
| 57 |
Partially correct |
6 ms |
340 KB |
Output is partially correct |
| 58 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 59 |
Partially correct |
7 ms |
344 KB |
Output is partially correct |
| 60 |
Correct |
7 ms |
344 KB |
Output is correct |
| 61 |
Correct |
9 ms |
344 KB |
Output is correct |
| 62 |
Correct |
5 ms |
432 KB |
Output is correct |
| 63 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 64 |
Partially correct |
7 ms |
344 KB |
Output is partially correct |
| 65 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 66 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 67 |
Correct |
8 ms |
344 KB |
Output is correct |
| 68 |
Correct |
8 ms |
432 KB |
Output is correct |
| 69 |
Correct |
8 ms |
344 KB |
Output is correct |
| 70 |
Correct |
10 ms |
440 KB |
Output is correct |
| 71 |
Partially correct |
15 ms |
344 KB |
Output is partially correct |
| 72 |
Partially correct |
9 ms |
344 KB |
Output is partially correct |
| 73 |
Partially correct |
7 ms |
340 KB |
Output is partially correct |
| 74 |
Partially correct |
6 ms |
344 KB |
Output is partially correct |
| 75 |
Correct |
9 ms |
344 KB |
Output is correct |
| 76 |
Correct |
13 ms |
600 KB |
Output is correct |
| 77 |
Partially correct |
10 ms |
344 KB |
Output is partially correct |
| 78 |
Partially correct |
6 ms |
344 KB |
Output is partially correct |
| 79 |
Partially correct |
11 ms |
344 KB |
Output is partially correct |
| 80 |
Partially correct |
7 ms |
344 KB |
Output is partially correct |
| 81 |
Correct |
11 ms |
344 KB |
Output is correct |
| 82 |
Correct |
11 ms |
600 KB |
Output is correct |
