#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
std::vector<int> longest_trip(int N, int D) {
mt19937 rnd(228);
vector<int> a, b, ord(N);
iota(ord.begin(), ord.end(), 0);
shuffle(ord.begin(), ord.end(), rnd);
int known = -1;
for (int x : ord) {
if (a.empty() || b.empty()) {
(a.empty() ? a : b).push_back(x);
continue;
}
if (rnd() % 2) {
swap(a, b);
}
if (1) {
int res = are_connected({a.back()}, {x});
if (res == 1) {
a.push_back(x);
known = -1;
} else if (known != -1) {
if (known == 1) { // unreachable
a.insert(a.end(), b.rbegin(), b.rend());
b = {x};
known = -1;
} else {
b.push_back(x);
known = 0;
}
} else {
res = are_connected({b.back()}, {x});
if (res == 0) {
a.insert(a.end(), b.rbegin(), b.rend());
b = {x};
known = -1;
} else {
b.push_back(x);
known = 0;
}
}
} else {
if (are_connected({a.back()}, {x})) {
a.push_back(x);
} else if (are_connected({b.back()}, {x})) {
b.push_back(x);
} else {
a.insert(a.end(), b.rbegin(), b.rend());
b = {x};
}
}
}
if (a.empty() || b.empty() || !are_connected(a, b)) {
return a.size() > b.size() ? a : b;
}
if (size(a) < size(b)) {
swap(a, b);
}
if (!are_connected(a, {b[0]}) && !are_connected(a, {b.back()})) {
int lo = 0, hi = size(b);
while (lo + 1 < hi) {
int mid = lo + hi >> 1;
if (are_connected(a, vector(b.begin(), b.begin() + mid))) {
hi = mid;
} else {
lo = mid;
}
}
rotate(b.begin(), b.begin() + lo, b.end());
} else if (!are_connected(a, {b[0]})) {
reverse(b.begin(), b.end());
}
assert(are_connected(a, {b[0]}));
if (are_connected({a[0], a.back()}, {b[0]})) {
if (are_connected({a[0]}, {b[0]})) {
reverse(a.begin(), a.end());
}
a.insert(a.end(), b.begin(), b.end());
return a;
} else {
int lo = 0, hi = size(a);
while (lo + 1 < hi) {
int mid = lo + hi >> 1;
if (are_connected(vector(a.begin(), a.begin() + mid), {b[0]})) {
hi = mid;
} else {
lo = mid;
}
}
rotate(a.begin(), a.begin() + hi, a.end());
a.insert(a.end(), b.begin(), b.end());
return a;
}
}
Compilation message
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:70:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
70 | int mid = lo + hi >> 1;
| ~~~^~~~
longesttrip.cpp:93:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
93 | int mid = lo + hi >> 1;
| ~~~^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
440 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
13 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 |
5 ms |
344 KB |
Output is correct |
| 5 |
Correct |
5 ms |
600 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
19 ms |
344 KB |
Output is correct |
| 2 |
Correct |
10 ms |
344 KB |
Output is correct |
| 3 |
Correct |
5 ms |
344 KB |
Output is correct |
| 4 |
Correct |
4 ms |
344 KB |
Output is correct |
| 5 |
Correct |
4 ms |
596 KB |
Output is correct |
| 6 |
Correct |
17 ms |
344 KB |
Output is correct |
| 7 |
Correct |
11 ms |
344 KB |
Output is correct |
| 8 |
Correct |
5 ms |
440 KB |
Output is correct |
| 9 |
Correct |
5 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 |
4 ms |
444 KB |
Output is correct |
| 13 |
Correct |
5 ms |
444 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
16 ms |
344 KB |
Output is correct |
| 2 |
Correct |
8 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 |
13 ms |
544 KB |
Output is correct |
| 7 |
Correct |
7 ms |
344 KB |
Output is correct |
| 8 |
Correct |
5 ms |
600 KB |
Output is correct |
| 9 |
Correct |
5 ms |
596 KB |
Output is correct |
| 10 |
Correct |
4 ms |
600 KB |
Output is correct |
| 11 |
Correct |
5 ms |
344 KB |
Output is correct |
| 12 |
Correct |
5 ms |
440 KB |
Output is correct |
| 13 |
Correct |
5 ms |
604 KB |
Output is correct |
| 14 |
Correct |
7 ms |
344 KB |
Output is correct |
| 15 |
Correct |
10 ms |
344 KB |
Output is correct |
| 16 |
Correct |
8 ms |
596 KB |
Output is correct |
| 17 |
Correct |
6 ms |
344 KB |
Output is correct |
| 18 |
Correct |
6 ms |
344 KB |
Output is correct |
| 19 |
Correct |
5 ms |
852 KB |
Output is correct |
| 20 |
Correct |
6 ms |
700 KB |
Output is correct |
| 21 |
Correct |
5 ms |
696 KB |
Output is correct |
| 22 |
Correct |
5 ms |
860 KB |
Output is correct |
| 23 |
Correct |
5 ms |
440 KB |
Output is correct |
| 24 |
Correct |
5 ms |
864 KB |
Output is correct |
| 25 |
Correct |
8 ms |
344 KB |
Output is correct |
| 26 |
Correct |
7 ms |
344 KB |
Output is correct |
| 27 |
Correct |
7 ms |
344 KB |
Output is correct |
| 28 |
Correct |
6 ms |
344 KB |
Output is correct |
| 29 |
Correct |
6 ms |
344 KB |
Output is correct |
| 30 |
Correct |
5 ms |
696 KB |
Output is correct |
| 31 |
Correct |
5 ms |
440 KB |
Output is correct |
| 32 |
Correct |
5 ms |
344 KB |
Output is correct |
| 33 |
Correct |
6 ms |
448 KB |
Output is correct |
| 34 |
Correct |
5 ms |
600 KB |
Output is correct |
| 35 |
Correct |
5 ms |
696 KB |
Output is correct |
| 36 |
Correct |
5 ms |
344 KB |
Output is correct |
| 37 |
Correct |
6 ms |
604 KB |
Output is correct |
| 38 |
Correct |
5 ms |
444 KB |
Output is correct |
| 39 |
Correct |
5 ms |
600 KB |
Output is correct |
| 40 |
Correct |
5 ms |
440 KB |
Output is correct |
| 41 |
Correct |
5 ms |
344 KB |
Output is correct |
| 42 |
Correct |
5 ms |
344 KB |
Output is correct |
| 43 |
Correct |
6 ms |
448 KB |
Output is correct |
| 44 |
Correct |
5 ms |
440 KB |
Output is correct |
| 45 |
Correct |
12 ms |
344 KB |
Output is correct |
| 46 |
Correct |
22 ms |
344 KB |
Output is correct |
| 47 |
Correct |
10 ms |
344 KB |
Output is correct |
| 48 |
Correct |
8 ms |
344 KB |
Output is correct |
| 49 |
Correct |
11 ms |
344 KB |
Output is correct |
| 50 |
Correct |
6 ms |
696 KB |
Output is correct |
| 51 |
Correct |
6 ms |
436 KB |
Output is correct |
| 52 |
Correct |
6 ms |
440 KB |
Output is correct |
| 53 |
Correct |
6 ms |
344 KB |
Output is correct |
| 54 |
Correct |
6 ms |
604 KB |
Output is correct |
| 55 |
Correct |
6 ms |
444 KB |
Output is correct |
| 56 |
Correct |
6 ms |
600 KB |
Output is correct |
| 57 |
Correct |
7 ms |
704 KB |
Output is correct |
| 58 |
Correct |
8 ms |
860 KB |
Output is correct |
| 59 |
Correct |
7 ms |
700 KB |
Output is correct |
| 60 |
Correct |
6 ms |
608 KB |
Output is correct |
| 61 |
Correct |
7 ms |
800 KB |
Output is correct |
| 62 |
Correct |
6 ms |
440 KB |
Output is correct |
| 63 |
Correct |
6 ms |
696 KB |
Output is correct |
| 64 |
Correct |
8 ms |
692 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
13 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 |
6 ms |
600 KB |
Output is correct |
| 5 |
Correct |
5 ms |
344 KB |
Output is correct |
| 6 |
Correct |
15 ms |
344 KB |
Output is correct |
| 7 |
Correct |
10 ms |
344 KB |
Output is correct |
| 8 |
Correct |
5 ms |
600 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 |
4 ms |
600 KB |
Output is correct |
| 13 |
Correct |
5 ms |
444 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 |
6 ms |
600 KB |
Output is correct |
| 18 |
Correct |
6 ms |
344 KB |
Output is correct |
| 19 |
Correct |
6 ms |
600 KB |
Output is correct |
| 20 |
Correct |
6 ms |
856 KB |
Output is correct |
| 21 |
Correct |
7 ms |
344 KB |
Output is correct |
| 22 |
Correct |
6 ms |
344 KB |
Output is correct |
| 23 |
Correct |
9 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 |
692 KB |
Output is correct |
| 27 |
Correct |
6 ms |
440 KB |
Output is correct |
| 28 |
Correct |
5 ms |
344 KB |
Output is correct |
| 29 |
Correct |
5 ms |
600 KB |
Output is correct |
| 30 |
Correct |
6 ms |
600 KB |
Output is correct |
| 31 |
Correct |
6 ms |
688 KB |
Output is correct |
| 32 |
Correct |
14 ms |
344 KB |
Output is correct |
| 33 |
Correct |
12 ms |
344 KB |
Output is correct |
| 34 |
Correct |
9 ms |
344 KB |
Output is correct |
| 35 |
Correct |
9 ms |
344 KB |
Output is correct |
| 36 |
Correct |
10 ms |
344 KB |
Output is correct |
| 37 |
Correct |
6 ms |
692 KB |
Output is correct |
| 38 |
Correct |
7 ms |
440 KB |
Output is correct |
| 39 |
Correct |
7 ms |
436 KB |
Output is correct |
| 40 |
Correct |
6 ms |
344 KB |
Output is correct |
| 41 |
Correct |
6 ms |
600 KB |
Output is correct |
| 42 |
Correct |
7 ms |
600 KB |
Output is correct |
| 43 |
Correct |
5 ms |
448 KB |
Output is correct |
| 44 |
Correct |
5 ms |
600 KB |
Output is correct |
| 45 |
Correct |
5 ms |
696 KB |
Output is correct |
| 46 |
Correct |
5 ms |
448 KB |
Output is correct |
| 47 |
Correct |
6 ms |
600 KB |
Output is correct |
| 48 |
Correct |
5 ms |
440 KB |
Output is correct |
| 49 |
Correct |
5 ms |
636 KB |
Output is correct |
| 50 |
Correct |
5 ms |
600 KB |
Output is correct |
| 51 |
Correct |
8 ms |
444 KB |
Output is correct |
| 52 |
Correct |
6 ms |
344 KB |
Output is correct |
| 53 |
Correct |
6 ms |
344 KB |
Output is correct |
| 54 |
Correct |
6 ms |
440 KB |
Output is correct |
| 55 |
Correct |
5 ms |
444 KB |
Output is correct |
| 56 |
Correct |
5 ms |
444 KB |
Output is correct |
| 57 |
Correct |
5 ms |
444 KB |
Output is correct |
| 58 |
Correct |
5 ms |
344 KB |
Output is correct |
| 59 |
Correct |
5 ms |
344 KB |
Output is correct |
| 60 |
Correct |
6 ms |
344 KB |
Output is correct |
| 61 |
Correct |
7 ms |
344 KB |
Output is correct |
| 62 |
Correct |
6 ms |
856 KB |
Output is correct |
| 63 |
Correct |
7 ms |
604 KB |
Output is correct |
| 64 |
Correct |
7 ms |
696 KB |
Output is correct |
| 65 |
Correct |
6 ms |
600 KB |
Output is correct |
| 66 |
Correct |
6 ms |
444 KB |
Output is correct |
| 67 |
Correct |
7 ms |
600 KB |
Output is correct |
| 68 |
Correct |
6 ms |
440 KB |
Output is correct |
| 69 |
Correct |
6 ms |
688 KB |
Output is correct |
| 70 |
Correct |
7 ms |
860 KB |
Output is correct |
| 71 |
Correct |
6 ms |
952 KB |
Output is correct |
| 72 |
Correct |
7 ms |
856 KB |
Output is correct |
| 73 |
Correct |
6 ms |
444 KB |
Output is correct |
| 74 |
Correct |
7 ms |
692 KB |
Output is correct |
| 75 |
Correct |
7 ms |
700 KB |
Output is correct |
| 76 |
Correct |
6 ms |
444 KB |
Output is correct |
| 77 |
Correct |
7 ms |
700 KB |
Output is correct |
| 78 |
Correct |
7 ms |
696 KB |
Output is correct |
| 79 |
Correct |
6 ms |
604 KB |
Output is correct |
| 80 |
Correct |
9 ms |
1108 KB |
Output is correct |
| 81 |
Correct |
7 ms |
600 KB |
Output is correct |
| 82 |
Correct |
6 ms |
600 KB |
Output is correct |
