#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
int n;
vector<int> a;
vector<int> b;
void solve() {
for (int i = 2; i < n - 1; i += 2) {
int x = i, y = i + 1;
bool A = are_connected({x}, {a.back()});
bool B = are_connected({x}, {b.back()});
if (are_connected({x}, {y})) {
if (A) {
a.push_back(x);
a.push_back(y);
}
if (!A && B) {
b.push_back(x);
b.push_back(y);
}
if (!A && !B) {
while (b.size()) {
a.push_back(b.back());
b.pop_back();
}
b.push_back(x);
b.push_back(y);
}
} else {
if (A == B) {
if (!A) swap(x, y);
a.push_back(x);
while (b.size()) {
a.push_back(b.back());
b.pop_back();
}
b.push_back(y);
} else {
if (!A) swap(x, y);
a.push_back(x);
b.push_back(y);
}
}
}
if (n % 2) {
if (are_connected({a.back()}, {b.back()})) {
while (b.size()) {
a.push_back(b.back());
b.pop_back();
}
}
if (are_connected({n - 1}, {a.back()})) a.push_back(n - 1);
else b.push_back(n - 1);
}
}
bool query(vector<int> &x, vector<int> &v, int l, int r) {
vector<int> u;
for (int i = l; i < r; i++) u.push_back(v[i]);
return are_connected(x, u);
}
int bin(vector<int> x, vector<int> &v) {
int l = 0, r = v.size(), m;
while (r - l > 1) {
m = (l + r) / 2;
(query(x, v, l, m) ? r = m : l = m);
}
return l;
}
vector<int> longest_trip(int N, int D) {
n = N;
a = {0};
b = {1};
solve();
if (a.size() < b.size()) swap(a, b);
if (!b.size() || !are_connected(a, b)) return a;
bool A = are_connected({a[0]}, {b.back()});
bool B = are_connected({b[0]}, {a.back()});
bool C = are_connected({a.back()}, {b.back()});
if (A) reverse(a.begin(), a.end());
if (!A && B) reverse(b.begin(), b.end());
if (A || B || C) {
while (b.size()) {
a.push_back(b.back());
b.pop_back();
}
return a;
}
int x = bin(b, a);
int y = bin({a[x]}, b);
vector<int> u;
for (int i = x + 1; i < a.size(); i++) u.push_back(a[i]);
for (int i = 0; i <= x; i++) u.push_back(a[i]);
for (int i = y; i < b.size(); i++) u.push_back(b[i]);
for (int i = 0; i < y; i++) u.push_back(b[i]);
return u;
}
Compilation message
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:98:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
98 | for (int i = x + 1; i < a.size(); i++) u.push_back(a[i]);
| ~~^~~~~~~~~~
longesttrip.cpp:100:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
100 | for (int i = y; i < b.size(); i++) u.push_back(b[i]);
| ~~^~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
2 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
344 KB |
Output is correct |
| 2 |
Correct |
8 ms |
344 KB |
Output is correct |
| 3 |
Correct |
10 ms |
344 KB |
Output is correct |
| 4 |
Correct |
5 ms |
344 KB |
Output is correct |
| 5 |
Correct |
8 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
344 KB |
Output is correct |
| 2 |
Correct |
8 ms |
344 KB |
Output is correct |
| 3 |
Correct |
11 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 |
12 ms |
344 KB |
Output is correct |
| 7 |
Correct |
11 ms |
344 KB |
Output is correct |
| 8 |
Correct |
5 ms |
344 KB |
Output is correct |
| 9 |
Correct |
7 ms |
344 KB |
Output is correct |
| 10 |
Correct |
8 ms |
344 KB |
Output is correct |
| 11 |
Correct |
11 ms |
344 KB |
Output is correct |
| 12 |
Correct |
7 ms |
344 KB |
Output is correct |
| 13 |
Correct |
6 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
344 KB |
Output is correct |
| 2 |
Correct |
12 ms |
344 KB |
Output is correct |
| 3 |
Correct |
10 ms |
344 KB |
Output is correct |
| 4 |
Correct |
7 ms |
344 KB |
Output is correct |
| 5 |
Correct |
8 ms |
344 KB |
Output is correct |
| 6 |
Correct |
9 ms |
344 KB |
Output is correct |
| 7 |
Correct |
9 ms |
344 KB |
Output is correct |
| 8 |
Correct |
5 ms |
344 KB |
Output is correct |
| 9 |
Correct |
8 ms |
344 KB |
Output is correct |
| 10 |
Correct |
7 ms |
344 KB |
Output is correct |
| 11 |
Correct |
8 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 |
9 ms |
344 KB |
Output is correct |
| 16 |
Correct |
7 ms |
344 KB |
Output is correct |
| 17 |
Correct |
5 ms |
344 KB |
Output is correct |
| 18 |
Correct |
8 ms |
344 KB |
Output is correct |
| 19 |
Correct |
9 ms |
344 KB |
Output is correct |
| 20 |
Correct |
7 ms |
344 KB |
Output is correct |
| 21 |
Correct |
7 ms |
436 KB |
Output is correct |
| 22 |
Correct |
8 ms |
344 KB |
Output is correct |
| 23 |
Correct |
5 ms |
340 KB |
Output is correct |
| 24 |
Correct |
7 ms |
596 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 |
5 ms |
344 KB |
Output is correct |
| 29 |
Correct |
7 ms |
344 KB |
Output is correct |
| 30 |
Correct |
5 ms |
344 KB |
Output is correct |
| 31 |
Correct |
9 ms |
344 KB |
Output is correct |
| 32 |
Correct |
8 ms |
344 KB |
Output is correct |
| 33 |
Correct |
6 ms |
436 KB |
Output is correct |
| 34 |
Correct |
7 ms |
344 KB |
Output is correct |
| 35 |
Correct |
7 ms |
344 KB |
Output is correct |
| 36 |
Correct |
7 ms |
344 KB |
Output is correct |
| 37 |
Correct |
7 ms |
344 KB |
Output is correct |
| 38 |
Correct |
9 ms |
344 KB |
Output is correct |
| 39 |
Correct |
6 ms |
344 KB |
Output is correct |
| 40 |
Correct |
9 ms |
600 KB |
Output is correct |
| 41 |
Correct |
11 ms |
344 KB |
Output is correct |
| 42 |
Correct |
7 ms |
344 KB |
Output is correct |
| 43 |
Correct |
7 ms |
344 KB |
Output is correct |
| 44 |
Correct |
8 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 |
7 ms |
344 KB |
Output is correct |
| 48 |
Correct |
12 ms |
344 KB |
Output is correct |
| 49 |
Correct |
10 ms |
344 KB |
Output is correct |
| 50 |
Correct |
9 ms |
344 KB |
Output is correct |
| 51 |
Correct |
9 ms |
344 KB |
Output is correct |
| 52 |
Correct |
11 ms |
344 KB |
Output is correct |
| 53 |
Correct |
8 ms |
344 KB |
Output is correct |
| 54 |
Correct |
7 ms |
344 KB |
Output is correct |
| 55 |
Correct |
7 ms |
600 KB |
Output is correct |
| 56 |
Correct |
7 ms |
344 KB |
Output is correct |
| 57 |
Correct |
8 ms |
440 KB |
Output is correct |
| 58 |
Correct |
8 ms |
432 KB |
Output is correct |
| 59 |
Correct |
8 ms |
344 KB |
Output is correct |
| 60 |
Correct |
7 ms |
344 KB |
Output is correct |
| 61 |
Correct |
8 ms |
344 KB |
Output is correct |
| 62 |
Correct |
10 ms |
432 KB |
Output is correct |
| 63 |
Correct |
11 ms |
344 KB |
Output is correct |
| 64 |
Correct |
8 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
344 KB |
Output is correct |
| 2 |
Correct |
8 ms |
344 KB |
Output is correct |
| 3 |
Correct |
9 ms |
344 KB |
Output is correct |
| 4 |
Correct |
9 ms |
344 KB |
Output is correct |
| 5 |
Correct |
8 ms |
344 KB |
Output is correct |
| 6 |
Correct |
12 ms |
344 KB |
Output is correct |
| 7 |
Correct |
6 ms |
344 KB |
Output is correct |
| 8 |
Correct |
8 ms |
344 KB |
Output is correct |
| 9 |
Correct |
8 ms |
344 KB |
Output is correct |
| 10 |
Correct |
6 ms |
436 KB |
Output is correct |
| 11 |
Correct |
8 ms |
344 KB |
Output is correct |
| 12 |
Correct |
8 ms |
344 KB |
Output is correct |
| 13 |
Correct |
9 ms |
344 KB |
Output is correct |
| 14 |
Correct |
6 ms |
344 KB |
Output is correct |
| 15 |
Correct |
9 ms |
344 KB |
Output is correct |
| 16 |
Correct |
12 ms |
344 KB |
Output is correct |
| 17 |
Correct |
8 ms |
344 KB |
Output is correct |
| 18 |
Correct |
11 ms |
344 KB |
Output is correct |
| 19 |
Correct |
11 ms |
344 KB |
Output is correct |
| 20 |
Correct |
8 ms |
344 KB |
Output is correct |
| 21 |
Correct |
4 ms |
344 KB |
Output is correct |
| 22 |
Correct |
6 ms |
344 KB |
Output is correct |
| 23 |
Correct |
7 ms |
344 KB |
Output is correct |
| 24 |
Correct |
6 ms |
344 KB |
Output is correct |
| 25 |
Correct |
7 ms |
344 KB |
Output is correct |
| 26 |
Correct |
6 ms |
344 KB |
Output is correct |
| 27 |
Correct |
10 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 |
10 ms |
344 KB |
Output is correct |
| 31 |
Correct |
6 ms |
344 KB |
Output is correct |
| 32 |
Correct |
10 ms |
344 KB |
Output is correct |
| 33 |
Correct |
10 ms |
344 KB |
Output is correct |
| 34 |
Correct |
8 ms |
344 KB |
Output is correct |
| 35 |
Correct |
9 ms |
344 KB |
Output is correct |
| 36 |
Correct |
8 ms |
344 KB |
Output is correct |
| 37 |
Correct |
6 ms |
344 KB |
Output is correct |
| 38 |
Correct |
8 ms |
344 KB |
Output is correct |
| 39 |
Correct |
6 ms |
344 KB |
Output is correct |
| 40 |
Correct |
8 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 |
6 ms |
340 KB |
Output is correct |
| 44 |
Correct |
9 ms |
344 KB |
Output is correct |
| 45 |
Correct |
8 ms |
344 KB |
Output is correct |
| 46 |
Correct |
8 ms |
344 KB |
Output is correct |
| 47 |
Correct |
7 ms |
344 KB |
Output is correct |
| 48 |
Correct |
5 ms |
344 KB |
Output is correct |
| 49 |
Correct |
7 ms |
344 KB |
Output is correct |
| 50 |
Correct |
8 ms |
344 KB |
Output is correct |
| 51 |
Correct |
7 ms |
344 KB |
Output is correct |
| 52 |
Correct |
7 ms |
344 KB |
Output is correct |
| 53 |
Correct |
6 ms |
344 KB |
Output is correct |
| 54 |
Correct |
7 ms |
344 KB |
Output is correct |
| 55 |
Correct |
8 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 |
10 ms |
344 KB |
Output is correct |
| 59 |
Correct |
7 ms |
344 KB |
Output is correct |
| 60 |
Correct |
7 ms |
344 KB |
Output is correct |
| 61 |
Correct |
7 ms |
344 KB |
Output is correct |
| 62 |
Correct |
7 ms |
344 KB |
Output is correct |
| 63 |
Correct |
8 ms |
344 KB |
Output is correct |
| 64 |
Correct |
8 ms |
436 KB |
Output is correct |
| 65 |
Correct |
9 ms |
344 KB |
Output is correct |
| 66 |
Correct |
10 ms |
344 KB |
Output is correct |
| 67 |
Correct |
8 ms |
440 KB |
Output is correct |
| 68 |
Correct |
8 ms |
436 KB |
Output is correct |
| 69 |
Correct |
9 ms |
344 KB |
Output is correct |
| 70 |
Correct |
8 ms |
344 KB |
Output is correct |
| 71 |
Correct |
8 ms |
344 KB |
Output is correct |
| 72 |
Correct |
9 ms |
436 KB |
Output is correct |
| 73 |
Correct |
6 ms |
344 KB |
Output is correct |
| 74 |
Correct |
10 ms |
344 KB |
Output is correct |
| 75 |
Correct |
9 ms |
344 KB |
Output is correct |
| 76 |
Correct |
6 ms |
344 KB |
Output is correct |
| 77 |
Correct |
7 ms |
344 KB |
Output is correct |
| 78 |
Correct |
7 ms |
432 KB |
Output is correct |
| 79 |
Correct |
6 ms |
344 KB |
Output is correct |
| 80 |
Correct |
8 ms |
344 KB |
Output is correct |
| 81 |
Correct |
6 ms |
344 KB |
Output is correct |
| 82 |
Correct |
9 ms |
440 KB |
Output is correct |
