| # | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1050121 | 2024-08-09T07:34:04 Z | phoenix | Longest Trip (IOI23_longesttrip) | C++17 | 743 ms | 1216 KB |
#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
#ifndef LOCAL
#define cerr if (false) cout
#endif
struct info {
vector<int> A;
vector<int> B;
vector<int> ord;
};
int N;
bool g[256][256];
bool are_con(vector<int> a, vector<int> b) {
for (int x : a) {
for (int y : b) {
if (g[x][y])
return true;
}
}
return false;
}
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
vector<int> operator + (vector<int> a, vector<int> b) {
for (int c : b) a.push_back(c);
return a;
}
void print(vector<int> a) {
cerr << '{';
for (int c : a)
cerr << c << ' ';
cerr << '}';
cerr << '\n';
}
vector<int> fin(vector<int> V, int x) {
for (int i = 0; i < (int)V.size() - 1; i++) {
if (V[i] == x) swap(V[i], V[i + 1]);
}
assert(V.back() == x);
return V;
}
vector<int> beg(vector<int> V, int x) {
for (int i = (int)V.size() - 1; i > 0; i--) {
if (V[i] == x) swap(V[i], V[i - 1]);
}
assert(V[0] == x);
return V;
}
vector<int> connect(vector<int> A, vector<int> B) {
int st = -1;
for (int c : B) {
if (are_con({A.back()}, {c})) {
st = c;
break;
}
}
assert(st != -1);
return A + beg(B, st);
};
info recursion(vector<int> V) {
if ((int)V.size() == 1)
return {V, {}, V};
vector<int> A, B;
vector<bool> us(N);
int p = V[rnd() % (int)V.size()];
cerr << "chosen vertex: " << p << '\n';
for (int c : V) if (p != c) {
if (!are_con({p}, {c})) {
B.push_back(c);
us[c] = true;
}
}
if (B.empty()) {
info res;
cerr << p << " is a star\n";
V.erase(find(V.begin(), V.end(), p));
info m = recursion(V);
if (m.ord.empty()) {
res.ord = m.A + vector<int>{p} + m.B;
} else {
res.ord = m.ord;
res.ord.push_back(p);
}
return res;
}
for (int c : V) {
if (us[c]) continue;
if (!are_con({c}, B)) {
A.push_back(c);
us[c] = true;
}
}
cerr << "Division: \n";
print(A);
print(B);
cerr << '\n';
shuffle(A.begin(), A.end(), rnd);
shuffle(B.begin(), B.end(), rnd);
vector<int> v1;
for (int c : V)
if (!us[c])
v1.push_back(c);
if (v1.empty())
return {A, B, {}};
info M = recursion(v1);
info res;
if (!M.ord.empty()) {
res.ord = fin(A, p) + connect(M.ord, B);
return res;
}
for (int it = 0; it < 2; it++) {
if ((int)A.size() == 1) {
res.ord = M.A + A + connect(M.B, B);
return res;
}
swap(A, B);
}
int c = A[(A[0] == p)], t = M.A[0];
if (are_con({c}, {t})) {
res.ord = fin(M.A, t) + beg(fin(A, p), c) + connect(M.B, B);
} else {
res.ord = fin(A, p) + connect(M.B, B) + beg(M.A, t);
}
return res;
}
vector<int> longest_trip(int N_ins, int D) {
N = N_ins;
for (int i = 0; i < N; i++) for (int j = 0; j < N; j++)
g[i][j] = 0;
for (int i = 0; i < N; i++)
for (int j = i + 1; j < N; j++) {
g[i][j] = g[j][i] = are_connected({i}, {j});
}
vector<int> v(N);
for (int i = 0; i < N; i++) v[i] = i;
info res = recursion(v);
if (res.ord.empty()) {
if ((int)res.A.size() < (int)res.B.size())
swap(res.A, res.B);
return res.A;
}
return res.ord;
}
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 1 ms | 344 KB | Output is correct |
| 2 | Correct | 162 ms | 484 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 6 ms | 344 KB | Output is correct |
| 2 | Correct | 18 ms | 344 KB | Output is correct |
| 3 | Correct | 112 ms | 344 KB | Output is correct |
| 4 | Correct | 300 ms | 448 KB | Output is correct |
| 5 | Correct | 669 ms | 732 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 5 ms | 344 KB | Output is correct |
| 2 | Correct | 18 ms | 344 KB | Output is correct |
| 3 | Correct | 90 ms | 344 KB | Output is correct |
| 4 | Correct | 305 ms | 592 KB | Output is correct |
| 5 | Correct | 731 ms | 736 KB | Output is correct |
| 6 | Correct | 8 ms | 344 KB | Output is correct |
| 7 | Correct | 19 ms | 344 KB | Output is correct |
| 8 | Correct | 115 ms | 600 KB | Output is correct |
| 9 | Correct | 251 ms | 344 KB | Output is correct |
| 10 | Correct | 687 ms | 1068 KB | Output is correct |
| 11 | Correct | 671 ms | 848 KB | Output is correct |
| 12 | Correct | 707 ms | 768 KB | Output is correct |
| 13 | Correct | 693 ms | 780 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 7 ms | 344 KB | Output is correct |
| 2 | Correct | 19 ms | 344 KB | Output is correct |
| 3 | Correct | 112 ms | 344 KB | Output is correct |
| 4 | Correct | 340 ms | 448 KB | Output is correct |
| 5 | Correct | 679 ms | 736 KB | Output is correct |
| 6 | Correct | 5 ms | 344 KB | Output is correct |
| 7 | Correct | 19 ms | 344 KB | Output is correct |
| 8 | Correct | 117 ms | 344 KB | Output is correct |
| 9 | Correct | 243 ms | 680 KB | Output is correct |
| 10 | Correct | 708 ms | 812 KB | Output is correct |
| 11 | Correct | 661 ms | 780 KB | Output is correct |
| 12 | Correct | 695 ms | 780 KB | Output is correct |
| 13 | Correct | 658 ms | 776 KB | Output is correct |
| 14 | Correct | 8 ms | 344 KB | Output is correct |
| 15 | Correct | 9 ms | 344 KB | Output is correct |
| 16 | Correct | 32 ms | 344 KB | Output is correct |
| 17 | Correct | 66 ms | 344 KB | Output is correct |
| 18 | Correct | 122 ms | 456 KB | Output is correct |
| 19 | Correct | 239 ms | 1216 KB | Output is correct |
| 20 | Correct | 230 ms | 468 KB | Output is correct |
| 21 | Correct | 648 ms | 552 KB | Output is correct |
| 22 | Correct | 673 ms | 792 KB | Output is correct |
| 23 | Correct | 659 ms | 596 KB | Output is correct |
| 24 | Correct | 690 ms | 592 KB | Output is correct |
| 25 | Correct | 9 ms | 344 KB | Output is correct |
| 26 | Correct | 7 ms | 344 KB | Output is correct |
| 27 | Correct | 24 ms | 344 KB | Output is correct |
| 28 | Correct | 18 ms | 344 KB | Output is correct |
| 29 | Correct | 18 ms | 344 KB | Output is correct |
| 30 | Correct | 153 ms | 344 KB | Output is correct |
| 31 | Correct | 159 ms | 344 KB | Output is correct |
| 32 | Correct | 168 ms | 344 KB | Output is correct |
| 33 | Correct | 274 ms | 460 KB | Output is correct |
| 34 | Correct | 232 ms | 592 KB | Output is correct |
| 35 | Correct | 260 ms | 344 KB | Output is correct |
| 36 | Correct | 731 ms | 480 KB | Output is correct |
| 37 | Correct | 689 ms | 484 KB | Output is correct |
| 38 | Correct | 692 ms | 592 KB | Output is correct |
| 39 | Correct | 647 ms | 476 KB | Output is correct |
| 40 | Correct | 727 ms | 480 KB | Output is correct |
| 41 | Correct | 721 ms | 476 KB | Output is correct |
| 42 | Correct | 693 ms | 484 KB | Output is correct |
| 43 | Correct | 691 ms | 476 KB | Output is correct |
| 44 | Correct | 668 ms | 484 KB | Output is correct |
| 45 | Correct | 6 ms | 344 KB | Output is correct |
| 46 | Correct | 7 ms | 344 KB | Output is correct |
| 47 | Correct | 28 ms | 344 KB | Output is correct |
| 48 | Correct | 18 ms | 344 KB | Output is correct |
| 49 | Correct | 21 ms | 344 KB | Output is correct |
| 50 | Correct | 179 ms | 344 KB | Output is correct |
| 51 | Correct | 158 ms | 600 KB | Output is correct |
| 52 | Correct | 166 ms | 452 KB | Output is correct |
| 53 | Correct | 243 ms | 344 KB | Output is correct |
| 54 | Correct | 276 ms | 596 KB | Output is correct |
| 55 | Correct | 243 ms | 344 KB | Output is correct |
| 56 | Correct | 720 ms | 480 KB | Output is correct |
| 57 | Correct | 697 ms | 480 KB | Output is correct |
| 58 | Correct | 657 ms | 484 KB | Output is correct |
| 59 | Correct | 743 ms | 484 KB | Output is correct |
| 60 | Correct | 734 ms | 480 KB | Output is correct |
| 61 | Correct | 652 ms | 480 KB | Output is correct |
| 62 | Correct | 696 ms | 344 KB | Output is correct |
| 63 | Correct | 657 ms | 480 KB | Output is correct |
| 64 | Correct | 638 ms | 484 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 5 ms | 344 KB | Output is correct |
| 2 | Correct | 18 ms | 344 KB | Output is correct |
| 3 | Partially correct | 114 ms | 344 KB | Output is partially correct |
| 4 | Partially correct | 361 ms | 448 KB | Output is partially correct |
| 5 | Partially correct | 690 ms | 732 KB | Output is partially correct |
| 6 | Correct | 4 ms | 344 KB | Output is correct |
| 7 | Correct | 18 ms | 344 KB | Output is correct |
| 8 | Partially correct | 117 ms | 344 KB | Output is partially correct |
| 9 | Partially correct | 271 ms | 780 KB | Output is partially correct |
| 10 | Partially correct | 698 ms | 988 KB | Output is partially correct |
| 11 | Partially correct | 706 ms | 776 KB | Output is partially correct |
| 12 | Partially correct | 703 ms | 776 KB | Output is partially correct |
| 13 | Partially correct | 696 ms | 772 KB | Output is partially correct |
| 14 | Correct | 7 ms | 344 KB | Output is correct |
| 15 | Correct | 9 ms | 344 KB | Output is correct |
| 16 | Correct | 35 ms | 456 KB | Output is correct |
| 17 | Partially correct | 67 ms | 344 KB | Output is partially correct |
| 18 | Partially correct | 112 ms | 344 KB | Output is partially correct |
| 19 | Partially correct | 195 ms | 472 KB | Output is partially correct |
| 20 | Partially correct | 225 ms | 720 KB | Output is partially correct |
| 21 | Correct | 10 ms | 344 KB | Output is correct |
| 22 | Correct | 7 ms | 344 KB | Output is correct |
| 23 | Correct | 20 ms | 344 KB | Output is correct |
| 24 | Correct | 17 ms | 340 KB | Output is correct |
| 25 | Correct | 22 ms | 344 KB | Output is correct |
| 26 | Partially correct | 153 ms | 344 KB | Output is partially correct |
| 27 | Partially correct | 162 ms | 344 KB | Output is partially correct |
| 28 | Partially correct | 160 ms | 344 KB | Output is partially correct |
| 29 | Partially correct | 257 ms | 344 KB | Output is partially correct |
| 30 | Partially correct | 254 ms | 592 KB | Output is partially correct |
| 31 | Partially correct | 253 ms | 456 KB | Output is partially correct |
| 32 | Correct | 7 ms | 344 KB | Output is correct |
| 33 | Correct | 7 ms | 344 KB | Output is correct |
| 34 | Correct | 20 ms | 344 KB | Output is correct |
| 35 | Correct | 16 ms | 344 KB | Output is correct |
| 36 | Correct | 24 ms | 344 KB | Output is correct |
| 37 | Partially correct | 147 ms | 464 KB | Output is partially correct |
| 38 | Partially correct | 178 ms | 344 KB | Output is partially correct |
| 39 | Partially correct | 150 ms | 344 KB | Output is partially correct |
| 40 | Partially correct | 284 ms | 444 KB | Output is partially correct |
| 41 | Partially correct | 262 ms | 444 KB | Output is partially correct |
| 42 | Partially correct | 249 ms | 344 KB | Output is partially correct |
| 43 | Partially correct | 700 ms | 544 KB | Output is partially correct |
| 44 | Partially correct | 656 ms | 556 KB | Output is partially correct |
| 45 | Partially correct | 701 ms | 556 KB | Output is partially correct |
| 46 | Partially correct | 655 ms | 792 KB | Output is partially correct |
| 47 | Partially correct | 664 ms | 480 KB | Output is partially correct |
| 48 | Partially correct | 702 ms | 476 KB | Output is partially correct |
| 49 | Partially correct | 715 ms | 476 KB | Output is partially correct |
| 50 | Partially correct | 693 ms | 480 KB | Output is partially correct |
| 51 | Partially correct | 647 ms | 616 KB | Output is partially correct |
| 52 | Partially correct | 702 ms | 480 KB | Output is partially correct |
| 53 | Partially correct | 666 ms | 476 KB | Output is partially correct |
| 54 | Partially correct | 702 ms | 480 KB | Output is partially correct |
| 55 | Partially correct | 723 ms | 480 KB | Output is partially correct |
| 56 | Partially correct | 709 ms | 484 KB | Output is partially correct |
| 57 | Partially correct | 708 ms | 484 KB | Output is partially correct |
| 58 | Partially correct | 690 ms | 476 KB | Output is partially correct |
| 59 | Partially correct | 651 ms | 476 KB | Output is partially correct |
| 60 | Partially correct | 657 ms | 592 KB | Output is partially correct |
| 61 | Partially correct | 664 ms | 480 KB | Output is partially correct |
| 62 | Partially correct | 693 ms | 592 KB | Output is partially correct |
| 63 | Partially correct | 688 ms | 496 KB | Output is partially correct |
| 64 | Partially correct | 682 ms | 492 KB | Output is partially correct |
| 65 | Partially correct | 653 ms | 480 KB | Output is partially correct |
| 66 | Partially correct | 688 ms | 476 KB | Output is partially correct |
| 67 | Partially correct | 705 ms | 476 KB | Output is partially correct |
| 68 | Partially correct | 639 ms | 596 KB | Output is partially correct |
| 69 | Partially correct | 689 ms | 736 KB | Output is partially correct |
| 70 | Partially correct | 689 ms | 480 KB | Output is partially correct |
| 71 | Partially correct | 725 ms | 480 KB | Output is partially correct |
| 72 | Partially correct | 727 ms | 480 KB | Output is partially correct |
| 73 | Partially correct | 662 ms | 484 KB | Output is partially correct |
| 74 | Partially correct | 685 ms | 484 KB | Output is partially correct |
| 75 | Partially correct | 667 ms | 476 KB | Output is partially correct |
| 76 | Partially correct | 656 ms | 480 KB | Output is partially correct |
| 77 | Partially correct | 561 ms | 480 KB | Output is partially correct |
| 78 | Partially correct | 610 ms | 476 KB | Output is partially correct |
| 79 | Partially correct | 617 ms | 476 KB | Output is partially correct |
| 80 | Partially correct | 624 ms | 492 KB | Output is partially correct |
| 81 | Partially correct | 676 ms | 480 KB | Output is partially correct |
| 82 | Partially correct | 604 ms | 484 KB | Output is partially correct |