#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> solve_d3(int N, int D)
{
vector<int> res(N);
iota(res.begin(), res.end(), 0);
return res;
}
vector<int> solve_d2(int N, int D)
{
queue<int> stops;
for (int i = 1; i < N; i++)
stops.push(i);
deque<int> trip = {0};
while (stops.size() > 1)
{
int next = stops.front();
stops.pop();
int last = trip.back();
if (are_connected({next}, {last}))
{
trip.push_back(next);
}
else
{
trip.push_back(stops.front());
stops.pop();
trip.push_back(next);
}
}
if (stops.size() == 1)
{
int next = stops.front();
int last = trip.back();
if (are_connected({next}, {last}))
{
trip.push_back(next);
}
else
{
trip.push_front(stops.front());
stops.pop();
}
}
vector<int> res;
for (int x : trip)
res.push_back(x);
return res;
}
int pop(queue<int> &q)
{
int x = q.front();
q.pop();
return x;
}
const bool maybe = true;
vector<int> longest_trip(int N, int D)
{
if (D == 3)
return solve_d3(N, D);
if (D == 2)
return solve_d2(N, D);
queue<int> nodes;
for (int i = 0; i < N; i++)
nodes.push(i);
vector<int> a, b;
a.push_back(pop(nodes));
bool ends_connected = maybe;
// false = a and b are not connected
// true = a and b are maybe connected
while (!nodes.empty())
{
if (b.empty())
{
int n = pop(nodes);
if (are_connected({a.back()}, {n}))
{
a.push_back(n);
}
else
{
// missed optimization
// we could cache that a and b are not connected
b.push_back(n);
ends_connected = false;
}
continue;
}
// both a and b are non-empty
int n = pop(nodes);
if (are_connected({a.back()}, {n}))
{
a.push_back(n);
ends_connected = maybe;
}
else if (are_connected({b.back()}, {n}))
{
b.push_back(n);
ends_connected = false;
}
else
{
// ends of a and b are definitely connected
while (!b.empty())
{
a.push_back(b.back());
b.pop_back();
}
assert(b.empty());
b.push_back(n);
}
}
if (b.empty())
{
return a;
}
if (ends_connected == maybe && are_connected({a.back()}, {b.back()}))
{
while (!b.empty())
{
a.push_back(b.back());
b.pop_back();
}
return a;
}
if (!are_connected(a, b))
{
if (a.size() > b.size())
{
return a;
}
else
{
return b;
}
}
if (a.size() < b.size())
swap(a, b);
assert(a.size() >= b.size());
bool a_circle = are_connected({a.front()}, {a.back()});
if (!a_circle)
{
for (int x : a)
b.push_back(x);
return b;
}
// a is a circle
bool b_circle = b.size() == 1 || are_connected({b.front()}, {b.back()});
if (!b_circle) {
for (int x : b) a.push_back(x);
return a;
}
// both a and b are circles
deque<int> A, B;
for (int x : a) A.push_back(x);
for (int x : b) B.push_back(x);
while (true) {
int e = A.front(); A.pop_front();
A.push_back(e);
if (are_connected({e}, b)) break;
}
while (true) {
int e = B.back(); B.pop_back();
B.push_front(e);
if (are_connected({A.back()}, {e})) break;
}
vector<int> res;
for (int x : A) res.push_back(x);
for (int x : B) res.push_back(x);
return res;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
3 ms |
344 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
356 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 |
0 ms |
344 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
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 |
5 ms |
344 KB |
Output is correct |
| 5 |
Correct |
6 ms |
344 KB |
Output is correct |
| 6 |
Correct |
5 ms |
344 KB |
Output is correct |
| 7 |
Correct |
4 ms |
344 KB |
Output is correct |
| 8 |
Correct |
4 ms |
340 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 |
4 ms |
344 KB |
Output is correct |
| 13 |
Correct |
5 ms |
344 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
8 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 |
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 |
436 KB |
Output is correct |
| 8 |
Correct |
5 ms |
344 KB |
Output is correct |
| 9 |
Correct |
7 ms |
344 KB |
Output is correct |
| 10 |
Correct |
6 ms |
344 KB |
Output is correct |
| 11 |
Correct |
6 ms |
344 KB |
Output is correct |
| 12 |
Correct |
4 ms |
344 KB |
Output is correct |
| 13 |
Correct |
5 ms |
344 KB |
Output is correct |
| 14 |
Correct |
7 ms |
344 KB |
Output is correct |
| 15 |
Correct |
11 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 |
6 ms |
344 KB |
Output is correct |
| 19 |
Correct |
6 ms |
344 KB |
Output is correct |
| 20 |
Correct |
6 ms |
344 KB |
Output is correct |
| 21 |
Correct |
7 ms |
344 KB |
Output is correct |
| 22 |
Correct |
6 ms |
344 KB |
Output is correct |
| 23 |
Correct |
6 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 |
8 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 |
9 ms |
344 KB |
Output is correct |
| 30 |
Correct |
5 ms |
344 KB |
Output is correct |
| 31 |
Correct |
7 ms |
344 KB |
Output is correct |
| 32 |
Correct |
9 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 |
8 ms |
344 KB |
Output is correct |
| 36 |
Correct |
5 ms |
344 KB |
Output is correct |
| 37 |
Correct |
4 ms |
344 KB |
Output is correct |
| 38 |
Correct |
5 ms |
344 KB |
Output is correct |
| 39 |
Correct |
6 ms |
344 KB |
Output is correct |
| 40 |
Correct |
7 ms |
344 KB |
Output is correct |
| 41 |
Correct |
9 ms |
344 KB |
Output is correct |
| 42 |
Correct |
9 ms |
344 KB |
Output is correct |
| 43 |
Correct |
8 ms |
344 KB |
Output is correct |
| 44 |
Correct |
7 ms |
344 KB |
Output is correct |
| 45 |
Correct |
8 ms |
344 KB |
Output is correct |
| 46 |
Correct |
10 ms |
344 KB |
Output is correct |
| 47 |
Correct |
9 ms |
344 KB |
Output is correct |
| 48 |
Correct |
12 ms |
344 KB |
Output is correct |
| 49 |
Correct |
7 ms |
344 KB |
Output is correct |
| 50 |
Correct |
7 ms |
344 KB |
Output is correct |
| 51 |
Correct |
10 ms |
344 KB |
Output is correct |
| 52 |
Correct |
10 ms |
344 KB |
Output is correct |
| 53 |
Correct |
7 ms |
344 KB |
Output is correct |
| 54 |
Correct |
11 ms |
344 KB |
Output is correct |
| 55 |
Correct |
7 ms |
344 KB |
Output is correct |
| 56 |
Correct |
7 ms |
344 KB |
Output is correct |
| 57 |
Correct |
7 ms |
344 KB |
Output is correct |
| 58 |
Correct |
11 ms |
344 KB |
Output is correct |
| 59 |
Correct |
12 ms |
344 KB |
Output is correct |
| 60 |
Correct |
12 ms |
348 KB |
Output is correct |
| 61 |
Correct |
8 ms |
344 KB |
Output is correct |
| 62 |
Correct |
12 ms |
344 KB |
Output is correct |
| 63 |
Correct |
11 ms |
344 KB |
Output is correct |
| 64 |
Correct |
12 ms |
600 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
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 |
5 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 |
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 |
7 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 |
7 ms |
344 KB |
Output is correct |
| 15 |
Correct |
7 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 |
6 ms |
344 KB |
Output is correct |
| 19 |
Correct |
6 ms |
344 KB |
Output is correct |
| 20 |
Correct |
9 ms |
344 KB |
Output is correct |
| 21 |
Correct |
7 ms |
344 KB |
Output is correct |
| 22 |
Correct |
11 ms |
344 KB |
Output is correct |
| 23 |
Correct |
6 ms |
344 KB |
Output is correct |
| 24 |
Correct |
8 ms |
344 KB |
Output is correct |
| 25 |
Correct |
6 ms |
344 KB |
Output is correct |
| 26 |
Correct |
4 ms |
340 KB |
Output is correct |
| 27 |
Correct |
7 ms |
344 KB |
Output is correct |
| 28 |
Correct |
6 ms |
344 KB |
Output is correct |
| 29 |
Correct |
5 ms |
344 KB |
Output is correct |
| 30 |
Correct |
9 ms |
344 KB |
Output is correct |
| 31 |
Correct |
6 ms |
344 KB |
Output is correct |
| 32 |
Correct |
8 ms |
344 KB |
Output is correct |
| 33 |
Correct |
13 ms |
344 KB |
Output is correct |
| 34 |
Correct |
9 ms |
344 KB |
Output is correct |
| 35 |
Correct |
8 ms |
344 KB |
Output is correct |
| 36 |
Correct |
12 ms |
432 KB |
Output is correct |
| 37 |
Correct |
7 ms |
344 KB |
Output is correct |
| 38 |
Correct |
10 ms |
344 KB |
Output is correct |
| 39 |
Correct |
15 ms |
344 KB |
Output is correct |
| 40 |
Correct |
7 ms |
344 KB |
Output is correct |
| 41 |
Correct |
6 ms |
344 KB |
Output is correct |
| 42 |
Correct |
8 ms |
344 KB |
Output is correct |
| 43 |
Correct |
4 ms |
344 KB |
Output is correct |
| 44 |
Correct |
6 ms |
344 KB |
Output is correct |
| 45 |
Correct |
6 ms |
344 KB |
Output is correct |
| 46 |
Correct |
7 ms |
436 KB |
Output is correct |
| 47 |
Correct |
5 ms |
344 KB |
Output is correct |
| 48 |
Correct |
6 ms |
344 KB |
Output is correct |
| 49 |
Correct |
6 ms |
344 KB |
Output is correct |
| 50 |
Correct |
7 ms |
344 KB |
Output is correct |
| 51 |
Partially correct |
7 ms |
344 KB |
Output is partially correct |
| 52 |
Correct |
6 ms |
344 KB |
Output is correct |
| 53 |
Correct |
5 ms |
344 KB |
Output is correct |
| 54 |
Correct |
8 ms |
344 KB |
Output is correct |
| 55 |
Correct |
6 ms |
344 KB |
Output is correct |
| 56 |
Correct |
5 ms |
344 KB |
Output is correct |
| 57 |
Partially correct |
9 ms |
344 KB |
Output is partially correct |
| 58 |
Partially correct |
7 ms |
344 KB |
Output is partially correct |
| 59 |
Partially correct |
6 ms |
344 KB |
Output is partially correct |
| 60 |
Correct |
8 ms |
344 KB |
Output is correct |
| 61 |
Correct |
7 ms |
344 KB |
Output is correct |
| 62 |
Partially correct |
7 ms |
344 KB |
Output is partially correct |
| 63 |
Partially correct |
9 ms |
344 KB |
Output is partially correct |
| 64 |
Partially correct |
10 ms |
344 KB |
Output is partially correct |
| 65 |
Partially correct |
14 ms |
344 KB |
Output is partially correct |
| 66 |
Partially correct |
17 ms |
344 KB |
Output is partially correct |
| 67 |
Partially correct |
10 ms |
344 KB |
Output is partially correct |
| 68 |
Partially correct |
12 ms |
344 KB |
Output is partially correct |
| 69 |
Partially correct |
10 ms |
444 KB |
Output is partially correct |
| 70 |
Partially correct |
11 ms |
344 KB |
Output is partially correct |
| 71 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 72 |
Partially correct |
10 ms |
344 KB |
Output is partially correct |
| 73 |
Partially correct |
17 ms |
344 KB |
Output is partially correct |
| 74 |
Partially correct |
14 ms |
344 KB |
Output is partially correct |
| 75 |
Partially correct |
14 ms |
440 KB |
Output is partially correct |
| 76 |
Partially correct |
12 ms |
344 KB |
Output is partially correct |
| 77 |
Partially correct |
9 ms |
428 KB |
Output is partially correct |
| 78 |
Partially correct |
16 ms |
436 KB |
Output is partially correct |
| 79 |
Partially correct |
11 ms |
344 KB |
Output is partially correct |
| 80 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 81 |
Partially correct |
10 ms |
344 KB |
Output is partially correct |
| 82 |
Partially correct |
11 ms |
344 KB |
Output is partially correct |
