#include <bits/stdc++.h>
#include <random>
#include "longesttrip.h"
using namespace std;
vector<int> pi,ip;
bool check(vector<int> a, vector<int> b) {
for (auto& x : a) x = pi[x];
for (auto& x : b) x = pi[x];
return are_connected(a,b);
}
vector<int> isline(vector<int> a) {
for (auto& x : a) x = pi[x];
#ifdef LOCAL
for (int i = 1; i < a.size(); ++i) {
assert(are_connected({a[i-1]}, {a[i]}));
}
#endif
return a;
}
mt19937 mt(361);
std::vector<int> longest_trip(int N, int D)
{
pi.resize(N);
iota(pi.begin(),pi.end(),0);
shuffle(pi.begin(),pi.end(),mt);
vector<int> s1({0}),s2({1});
bool sep = false;
for (int i = 2; i < N; ++i) {
if (check({s1.back()}, {i})) {
s1.push_back(i);
sep = false;
} else if (sep || check({s2.back()}, {i})) {
s2.push_back(i);
sep = true;
} else {
if (false && i < N-1) {
if (check({i},{i+1})) {
while (!s2.empty()) {
s1.push_back(s2.back());
s2.pop_back();
}
s2.push_back(i);
s2.push_back(i+1);
} else {
s1.push_back(i+1);
while (!s2.empty()) {
s1.push_back(s2.back());
s2.pop_back();
}
s2.push_back(i);
}
++i;
} else {
while (!s2.empty()) {
s1.push_back(s2.back());
s2.pop_back();
}
s2.push_back(i);
}
}
}
// for (auto x : s1) cerr << x << " ";
// cerr << "\n";
// for (auto x : s2) cerr << x << " ";
// cerr << "\n";
if (!check(s1, s2)) {
return isline(s1.size() >= s2.size() ? s1 : s2);
}
if (check(s1,{s2.front()})) {
reverse(s2.begin(),s2.end());
} else {
int lo = 0, hi = s2.size();
while (hi-lo>1) {
int mid = (lo+hi)/2;
vector<int> v;
for (int i = mid; i < hi; ++i) {
v.push_back(s2[i]);
}
if (!check(s1, v)) {
hi = mid;
} else {
lo = mid;
}
}
rotate(s2.begin(),s2.begin()+hi,s2.end());
}
if (check({s1.front()},{s2.back()})) {
reverse(s1.begin(),s1.end());
} else {
int lo = 0, hi = s1.size();
while (hi-lo>1) {
int mid = (lo+hi)/2;
vector<int> v;
for (int i = mid; i < hi; ++i) {
v.push_back(s1[i]);
}
if (!check(v, {s2.back()})) {
hi = mid;
} else {
lo = mid;
}
}
rotate(s1.begin(),s1.begin()+hi,s1.end());
}
// for (auto x : s1) cerr << x << " ";
// cerr << "\n";
// for (auto x : s2) cerr << x << " ";
// cerr << "\n";
while (!s2.empty()) {
s1.push_back(s2.back());
s2.pop_back();
}
return isline(s1);
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
208 KB |
Output is correct |
| 2 |
Correct |
2 ms |
424 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
16 ms |
208 KB |
Output is correct |
| 2 |
Correct |
7 ms |
208 KB |
Output is correct |
| 3 |
Correct |
8 ms |
208 KB |
Output is correct |
| 4 |
Correct |
9 ms |
208 KB |
Output is correct |
| 5 |
Correct |
7 ms |
292 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
208 KB |
Output is correct |
| 2 |
Correct |
13 ms |
208 KB |
Output is correct |
| 3 |
Correct |
7 ms |
208 KB |
Output is correct |
| 4 |
Correct |
6 ms |
208 KB |
Output is correct |
| 5 |
Correct |
10 ms |
208 KB |
Output is correct |
| 6 |
Correct |
15 ms |
208 KB |
Output is correct |
| 7 |
Correct |
12 ms |
208 KB |
Output is correct |
| 8 |
Correct |
11 ms |
208 KB |
Output is correct |
| 9 |
Correct |
7 ms |
208 KB |
Output is correct |
| 10 |
Correct |
9 ms |
208 KB |
Output is correct |
| 11 |
Correct |
9 ms |
300 KB |
Output is correct |
| 12 |
Correct |
10 ms |
304 KB |
Output is correct |
| 13 |
Correct |
10 ms |
312 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
14 ms |
208 KB |
Output is correct |
| 2 |
Correct |
8 ms |
208 KB |
Output is correct |
| 3 |
Correct |
9 ms |
208 KB |
Output is correct |
| 4 |
Correct |
9 ms |
208 KB |
Output is correct |
| 5 |
Correct |
6 ms |
208 KB |
Output is correct |
| 6 |
Correct |
12 ms |
208 KB |
Output is correct |
| 7 |
Correct |
9 ms |
208 KB |
Output is correct |
| 8 |
Correct |
10 ms |
208 KB |
Output is correct |
| 9 |
Correct |
6 ms |
208 KB |
Output is correct |
| 10 |
Correct |
10 ms |
208 KB |
Output is correct |
| 11 |
Correct |
9 ms |
312 KB |
Output is correct |
| 12 |
Correct |
10 ms |
316 KB |
Output is correct |
| 13 |
Correct |
7 ms |
208 KB |
Output is correct |
| 14 |
Correct |
13 ms |
208 KB |
Output is correct |
| 15 |
Correct |
14 ms |
208 KB |
Output is correct |
| 16 |
Correct |
13 ms |
208 KB |
Output is correct |
| 17 |
Correct |
11 ms |
208 KB |
Output is correct |
| 18 |
Correct |
10 ms |
208 KB |
Output is correct |
| 19 |
Correct |
8 ms |
304 KB |
Output is correct |
| 20 |
Correct |
14 ms |
304 KB |
Output is correct |
| 21 |
Correct |
12 ms |
316 KB |
Output is correct |
| 22 |
Correct |
10 ms |
316 KB |
Output is correct |
| 23 |
Correct |
7 ms |
304 KB |
Output is correct |
| 24 |
Correct |
12 ms |
428 KB |
Output is correct |
| 25 |
Correct |
9 ms |
208 KB |
Output is correct |
| 26 |
Correct |
7 ms |
208 KB |
Output is correct |
| 27 |
Correct |
10 ms |
208 KB |
Output is correct |
| 28 |
Correct |
7 ms |
208 KB |
Output is correct |
| 29 |
Correct |
11 ms |
208 KB |
Output is correct |
| 30 |
Correct |
14 ms |
288 KB |
Output is correct |
| 31 |
Correct |
13 ms |
208 KB |
Output is correct |
| 32 |
Correct |
12 ms |
208 KB |
Output is correct |
| 33 |
Correct |
9 ms |
304 KB |
Output is correct |
| 34 |
Correct |
4 ms |
300 KB |
Output is correct |
| 35 |
Correct |
8 ms |
208 KB |
Output is correct |
| 36 |
Correct |
7 ms |
208 KB |
Output is correct |
| 37 |
Correct |
9 ms |
208 KB |
Output is correct |
| 38 |
Correct |
9 ms |
208 KB |
Output is correct |
| 39 |
Correct |
14 ms |
208 KB |
Output is correct |
| 40 |
Correct |
9 ms |
208 KB |
Output is correct |
| 41 |
Correct |
7 ms |
208 KB |
Output is correct |
| 42 |
Correct |
11 ms |
308 KB |
Output is correct |
| 43 |
Correct |
10 ms |
208 KB |
Output is correct |
| 44 |
Correct |
9 ms |
208 KB |
Output is correct |
| 45 |
Correct |
18 ms |
208 KB |
Output is correct |
| 46 |
Correct |
14 ms |
208 KB |
Output is correct |
| 47 |
Correct |
13 ms |
208 KB |
Output is correct |
| 48 |
Correct |
9 ms |
208 KB |
Output is correct |
| 49 |
Correct |
10 ms |
208 KB |
Output is correct |
| 50 |
Correct |
7 ms |
208 KB |
Output is correct |
| 51 |
Correct |
13 ms |
208 KB |
Output is correct |
| 52 |
Correct |
13 ms |
208 KB |
Output is correct |
| 53 |
Correct |
10 ms |
300 KB |
Output is correct |
| 54 |
Correct |
9 ms |
208 KB |
Output is correct |
| 55 |
Correct |
9 ms |
208 KB |
Output is correct |
| 56 |
Correct |
8 ms |
308 KB |
Output is correct |
| 57 |
Correct |
6 ms |
208 KB |
Output is correct |
| 58 |
Correct |
13 ms |
308 KB |
Output is correct |
| 59 |
Correct |
8 ms |
208 KB |
Output is correct |
| 60 |
Correct |
9 ms |
292 KB |
Output is correct |
| 61 |
Correct |
12 ms |
304 KB |
Output is correct |
| 62 |
Correct |
11 ms |
312 KB |
Output is correct |
| 63 |
Correct |
11 ms |
308 KB |
Output is correct |
| 64 |
Correct |
12 ms |
304 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
13 ms |
208 KB |
Output is correct |
| 2 |
Correct |
7 ms |
208 KB |
Output is correct |
| 3 |
Correct |
9 ms |
208 KB |
Output is correct |
| 4 |
Correct |
7 ms |
208 KB |
Output is correct |
| 5 |
Correct |
8 ms |
208 KB |
Output is correct |
| 6 |
Correct |
13 ms |
208 KB |
Output is correct |
| 7 |
Correct |
9 ms |
208 KB |
Output is correct |
| 8 |
Correct |
7 ms |
208 KB |
Output is correct |
| 9 |
Correct |
5 ms |
208 KB |
Output is correct |
| 10 |
Correct |
8 ms |
304 KB |
Output is correct |
| 11 |
Correct |
6 ms |
336 KB |
Output is correct |
| 12 |
Correct |
8 ms |
288 KB |
Output is correct |
| 13 |
Correct |
6 ms |
276 KB |
Output is correct |
| 14 |
Correct |
11 ms |
208 KB |
Output is correct |
| 15 |
Correct |
12 ms |
208 KB |
Output is correct |
| 16 |
Correct |
13 ms |
208 KB |
Output is correct |
| 17 |
Correct |
9 ms |
208 KB |
Output is correct |
| 18 |
Correct |
12 ms |
304 KB |
Output is correct |
| 19 |
Correct |
9 ms |
208 KB |
Output is correct |
| 20 |
Correct |
8 ms |
304 KB |
Output is correct |
| 21 |
Correct |
9 ms |
208 KB |
Output is correct |
| 22 |
Correct |
12 ms |
208 KB |
Output is correct |
| 23 |
Correct |
9 ms |
208 KB |
Output is correct |
| 24 |
Correct |
7 ms |
208 KB |
Output is correct |
| 25 |
Correct |
10 ms |
208 KB |
Output is correct |
| 26 |
Correct |
10 ms |
208 KB |
Output is correct |
| 27 |
Correct |
8 ms |
208 KB |
Output is correct |
| 28 |
Correct |
10 ms |
208 KB |
Output is correct |
| 29 |
Correct |
9 ms |
208 KB |
Output is correct |
| 30 |
Correct |
9 ms |
304 KB |
Output is correct |
| 31 |
Correct |
8 ms |
208 KB |
Output is correct |
| 32 |
Correct |
16 ms |
208 KB |
Output is correct |
| 33 |
Correct |
17 ms |
208 KB |
Output is correct |
| 34 |
Correct |
7 ms |
208 KB |
Output is correct |
| 35 |
Correct |
10 ms |
208 KB |
Output is correct |
| 36 |
Correct |
11 ms |
208 KB |
Output is correct |
| 37 |
Correct |
7 ms |
208 KB |
Output is correct |
| 38 |
Correct |
12 ms |
208 KB |
Output is correct |
| 39 |
Correct |
10 ms |
208 KB |
Output is correct |
| 40 |
Correct |
10 ms |
304 KB |
Output is correct |
| 41 |
Correct |
8 ms |
208 KB |
Output is correct |
| 42 |
Correct |
11 ms |
208 KB |
Output is correct |
| 43 |
Correct |
8 ms |
304 KB |
Output is correct |
| 44 |
Correct |
8 ms |
208 KB |
Output is correct |
| 45 |
Correct |
9 ms |
300 KB |
Output is correct |
| 46 |
Correct |
9 ms |
208 KB |
Output is correct |
| 47 |
Correct |
9 ms |
208 KB |
Output is correct |
| 48 |
Correct |
10 ms |
208 KB |
Output is correct |
| 49 |
Correct |
10 ms |
208 KB |
Output is correct |
| 50 |
Correct |
10 ms |
208 KB |
Output is correct |
| 51 |
Correct |
12 ms |
304 KB |
Output is correct |
| 52 |
Correct |
11 ms |
304 KB |
Output is correct |
| 53 |
Correct |
12 ms |
296 KB |
Output is correct |
| 54 |
Correct |
8 ms |
208 KB |
Output is correct |
| 55 |
Correct |
13 ms |
304 KB |
Output is correct |
| 56 |
Correct |
10 ms |
208 KB |
Output is correct |
| 57 |
Correct |
7 ms |
208 KB |
Output is correct |
| 58 |
Correct |
11 ms |
308 KB |
Output is correct |
| 59 |
Correct |
9 ms |
208 KB |
Output is correct |
| 60 |
Correct |
7 ms |
208 KB |
Output is correct |
| 61 |
Correct |
10 ms |
304 KB |
Output is correct |
| 62 |
Correct |
7 ms |
208 KB |
Output is correct |
| 63 |
Correct |
8 ms |
308 KB |
Output is correct |
| 64 |
Correct |
11 ms |
208 KB |
Output is correct |
| 65 |
Correct |
14 ms |
208 KB |
Output is correct |
| 66 |
Correct |
8 ms |
208 KB |
Output is correct |
| 67 |
Correct |
9 ms |
208 KB |
Output is correct |
| 68 |
Correct |
13 ms |
208 KB |
Output is correct |
| 69 |
Correct |
11 ms |
208 KB |
Output is correct |
| 70 |
Correct |
11 ms |
208 KB |
Output is correct |
| 71 |
Correct |
5 ms |
308 KB |
Output is correct |
| 72 |
Correct |
8 ms |
208 KB |
Output is correct |
| 73 |
Correct |
13 ms |
288 KB |
Output is correct |
| 74 |
Correct |
12 ms |
208 KB |
Output is correct |
| 75 |
Correct |
13 ms |
304 KB |
Output is correct |
| 76 |
Correct |
8 ms |
308 KB |
Output is correct |
| 77 |
Correct |
10 ms |
308 KB |
Output is correct |
| 78 |
Correct |
8 ms |
208 KB |
Output is correct |
| 79 |
Correct |
14 ms |
208 KB |
Output is correct |
| 80 |
Correct |
13 ms |
208 KB |
Output is correct |
| 81 |
Correct |
10 ms |
208 KB |
Output is correct |
| 82 |
Correct |
13 ms |
312 KB |
Output is correct |
