#include <bits/stdc++.h>
using namespace std;
#include "longesttrip.h"
vector<int> longest_trip(int n, int d){
assert(d>0);
vector<vector<int> > chains;
for(int i=0; i<n; i++) chains.push_back({i});
mt19937 rng(999);
shuffle(chains.begin(),chains.end(),rng);
while((int)chains.size()>2){
vector<int> take[3];
for(int i=0; i<3; i++){
swap(take[i],chains[(int)chains.size()-i-1]);
}
chains.pop_back();
if(are_connected({take[0][0]},{take[2][0]})) swap(take[1],take[2]);
else if(are_connected({take[1][0]},{take[2][0]})) swap(take[0],take[2]);
reverse(take[0].begin(),take[0].end());
for(int i:take[1]) take[0].push_back(i);
take[1].clear();
swap(chains[(int)chains.size()-1],take[0]);
swap(chains[(int)chains.size()-2],take[2]);
}
assert((int)chains.size()==2);
if(are_connected(chains[0],chains[1])){
int lo=0,hi=chains[1].size()-1,mid;
vector<int> hehe;
while(lo<hi){
hehe.clear();
mid=(lo+hi)/2;
for(int i=lo; i<=mid; i++) hehe.push_back(chains[1][i]);
if(are_connected(chains[0],hehe)) hi=mid;
else lo=mid+1;
}
int m2=chains[1][lo];
lo=0,hi=chains[0].size()-1;
while(lo<hi){
hehe.clear();
mid=(lo+hi)/2;
for(int i=lo; i<=mid; i++) hehe.push_back(chains[0][i]);
if(are_connected({m2},hehe)) hi=mid;
else lo=mid+1;
}
int m1=chains[0][lo];
if(m2!=chains[1][0]&&m2!=chains[1].back()){
if(are_connected({m1},{chains[1].back()})){
reverse(chains[1].begin(),chains[1].end());
}
else if(are_connected({chains[1][0]},{chains[1].back()})){
hehe.clear();
while(!chains[1].empty()){
if(chains[1].back()==m2) break;
hehe.push_back(chains[1].back());
chains[1].pop_back();
}
reverse(chains[1].begin(),chains[1].end());
for(int i:hehe) chains[1].push_back(i);
}
}
else if(m2==chains[1].back()) reverse(chains[1].begin(),chains[1].end());
if(m1==chains[0].back()){
for(int i:chains[1]) chains[0].push_back(i);
return chains[0];
}
else if(m1==chains[0][0]){
reverse(chains[0].begin(),chains[0].end());
for(int i:chains[1]) chains[0].push_back(i);
return chains[0];
}
else{
if(are_connected({chains[0][0]},{chains[1].back()})){
for(int i:chains[0]) chains[1].push_back(i);
return chains[1];
}
else if(are_connected({chains[0].back()},{chains[1].back()})){
reverse(chains[1].begin(),chains[1].end());
for(int i:chains[1]) chains[0].push_back(i);
return chains[0];
}
else{
hehe.clear();
while(!chains[0].empty()){
if(chains[0].back()==m1) break;
hehe.push_back(chains[0].back());
chains[0].pop_back();
}
vector<int> ans;
while(!hehe.empty()){
ans.push_back(hehe.back());
hehe.pop_back();
}
for(int i:chains[0]) ans.push_back(i);
for(int i:chains[1]) ans.push_back(i);
return ans;
}
}
}
else{
if(chains[0].size()>chains[1].size()) return chains[0];
else return chains[1];
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
3 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
7 ms |
344 KB |
Output is correct |
| 2 |
Correct |
7 ms |
344 KB |
Output is correct |
| 3 |
Correct |
8 ms |
344 KB |
Output is correct |
| 4 |
Correct |
6 ms |
344 KB |
Output is correct |
| 5 |
Correct |
6 ms |
460 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
344 KB |
Output is correct |
| 2 |
Correct |
7 ms |
344 KB |
Output is correct |
| 3 |
Correct |
6 ms |
344 KB |
Output is correct |
| 4 |
Correct |
6 ms |
344 KB |
Output is correct |
| 5 |
Correct |
6 ms |
452 KB |
Output is correct |
| 6 |
Correct |
8 ms |
344 KB |
Output is correct |
| 7 |
Correct |
11 ms |
344 KB |
Output is correct |
| 8 |
Correct |
6 ms |
344 KB |
Output is correct |
| 9 |
Correct |
6 ms |
344 KB |
Output is correct |
| 10 |
Correct |
5 ms |
344 KB |
Output is correct |
| 11 |
Correct |
6 ms |
344 KB |
Output is correct |
| 12 |
Correct |
6 ms |
456 KB |
Output is correct |
| 13 |
Correct |
6 ms |
456 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
344 KB |
Output is correct |
| 2 |
Correct |
12 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 |
6 ms |
456 KB |
Output is correct |
| 6 |
Correct |
8 ms |
344 KB |
Output is correct |
| 7 |
Correct |
9 ms |
344 KB |
Output is correct |
| 8 |
Correct |
8 ms |
344 KB |
Output is correct |
| 9 |
Correct |
6 ms |
344 KB |
Output is correct |
| 10 |
Correct |
5 ms |
464 KB |
Output is correct |
| 11 |
Correct |
8 ms |
344 KB |
Output is correct |
| 12 |
Correct |
6 ms |
344 KB |
Output is correct |
| 13 |
Correct |
7 ms |
344 KB |
Output is correct |
| 14 |
Correct |
7 ms |
344 KB |
Output is correct |
| 15 |
Correct |
8 ms |
344 KB |
Output is correct |
| 16 |
Correct |
8 ms |
344 KB |
Output is correct |
| 17 |
Correct |
11 ms |
344 KB |
Output is correct |
| 18 |
Correct |
6 ms |
344 KB |
Output is correct |
| 19 |
Correct |
6 ms |
448 KB |
Output is correct |
| 20 |
Correct |
5 ms |
344 KB |
Output is correct |
| 21 |
Correct |
6 ms |
460 KB |
Output is correct |
| 22 |
Correct |
8 ms |
600 KB |
Output is correct |
| 23 |
Correct |
7 ms |
344 KB |
Output is correct |
| 24 |
Correct |
8 ms |
468 KB |
Output is correct |
| 25 |
Correct |
9 ms |
344 KB |
Output is correct |
| 26 |
Correct |
6 ms |
344 KB |
Output is correct |
| 27 |
Correct |
6 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 |
344 KB |
Output is correct |
| 31 |
Correct |
7 ms |
344 KB |
Output is correct |
| 32 |
Correct |
8 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 |
444 KB |
Output is correct |
| 36 |
Correct |
6 ms |
456 KB |
Output is correct |
| 37 |
Correct |
5 ms |
344 KB |
Output is correct |
| 38 |
Correct |
7 ms |
344 KB |
Output is correct |
| 39 |
Correct |
10 ms |
600 KB |
Output is correct |
| 40 |
Correct |
8 ms |
344 KB |
Output is correct |
| 41 |
Correct |
9 ms |
344 KB |
Output is correct |
| 42 |
Correct |
8 ms |
344 KB |
Output is correct |
| 43 |
Correct |
6 ms |
344 KB |
Output is correct |
| 44 |
Correct |
8 ms |
344 KB |
Output is correct |
| 45 |
Correct |
13 ms |
344 KB |
Output is correct |
| 46 |
Correct |
10 ms |
344 KB |
Output is correct |
| 47 |
Correct |
8 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 |
5 ms |
344 KB |
Output is correct |
| 51 |
Correct |
8 ms |
344 KB |
Output is correct |
| 52 |
Correct |
10 ms |
344 KB |
Output is correct |
| 53 |
Correct |
4 ms |
344 KB |
Output is correct |
| 54 |
Correct |
7 ms |
344 KB |
Output is correct |
| 55 |
Correct |
6 ms |
344 KB |
Output is correct |
| 56 |
Correct |
6 ms |
600 KB |
Output is correct |
| 57 |
Correct |
6 ms |
344 KB |
Output is correct |
| 58 |
Correct |
6 ms |
596 KB |
Output is correct |
| 59 |
Correct |
7 ms |
344 KB |
Output is correct |
| 60 |
Correct |
9 ms |
600 KB |
Output is correct |
| 61 |
Correct |
7 ms |
344 KB |
Output is correct |
| 62 |
Correct |
7 ms |
344 KB |
Output is correct |
| 63 |
Correct |
7 ms |
456 KB |
Output is correct |
| 64 |
Correct |
8 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
7 ms |
344 KB |
Output is correct |
| 2 |
Correct |
7 ms |
344 KB |
Output is correct |
| 3 |
Correct |
6 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 |
12 ms |
344 KB |
Output is correct |
| 7 |
Correct |
8 ms |
344 KB |
Output is correct |
| 8 |
Correct |
6 ms |
344 KB |
Output is correct |
| 9 |
Correct |
6 ms |
344 KB |
Output is correct |
| 10 |
Correct |
6 ms |
344 KB |
Output is correct |
| 11 |
Correct |
4 ms |
344 KB |
Output is correct |
| 12 |
Correct |
6 ms |
452 KB |
Output is correct |
| 13 |
Correct |
6 ms |
344 KB |
Output is correct |
| 14 |
Correct |
9 ms |
344 KB |
Output is correct |
| 15 |
Correct |
8 ms |
344 KB |
Output is correct |
| 16 |
Correct |
9 ms |
344 KB |
Output is correct |
| 17 |
Correct |
6 ms |
344 KB |
Output is correct |
| 18 |
Correct |
8 ms |
344 KB |
Output is correct |
| 19 |
Correct |
7 ms |
344 KB |
Output is correct |
| 20 |
Correct |
8 ms |
452 KB |
Output is correct |
| 21 |
Correct |
6 ms |
344 KB |
Output is correct |
| 22 |
Correct |
7 ms |
344 KB |
Output is correct |
| 23 |
Correct |
7 ms |
344 KB |
Output is correct |
| 24 |
Correct |
6 ms |
348 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 |
8 ms |
344 KB |
Output is correct |
| 29 |
Correct |
5 ms |
344 KB |
Output is correct |
| 30 |
Correct |
6 ms |
344 KB |
Output is correct |
| 31 |
Correct |
6 ms |
344 KB |
Output is correct |
| 32 |
Correct |
7 ms |
344 KB |
Output is correct |
| 33 |
Correct |
14 ms |
344 KB |
Output is correct |
| 34 |
Correct |
7 ms |
344 KB |
Output is correct |
| 35 |
Correct |
8 ms |
352 KB |
Output is correct |
| 36 |
Correct |
10 ms |
344 KB |
Output is correct |
| 37 |
Correct |
8 ms |
344 KB |
Output is correct |
| 38 |
Correct |
8 ms |
344 KB |
Output is correct |
| 39 |
Correct |
11 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 |
7 ms |
356 KB |
Output is correct |
| 43 |
Correct |
7 ms |
452 KB |
Output is correct |
| 44 |
Correct |
9 ms |
716 KB |
Output is correct |
| 45 |
Correct |
6 ms |
344 KB |
Output is correct |
| 46 |
Correct |
7 ms |
344 KB |
Output is correct |
| 47 |
Correct |
8 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 |
600 KB |
Output is correct |
| 51 |
Correct |
9 ms |
344 KB |
Output is correct |
| 52 |
Correct |
8 ms |
344 KB |
Output is correct |
| 53 |
Correct |
8 ms |
344 KB |
Output is correct |
| 54 |
Correct |
8 ms |
344 KB |
Output is correct |
| 55 |
Correct |
8 ms |
460 KB |
Output is correct |
| 56 |
Correct |
4 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 |
7 ms |
344 KB |
Output is correct |
| 60 |
Correct |
8 ms |
344 KB |
Output is correct |
| 61 |
Correct |
8 ms |
456 KB |
Output is correct |
| 62 |
Correct |
6 ms |
344 KB |
Output is correct |
| 63 |
Correct |
7 ms |
344 KB |
Output is correct |
| 64 |
Correct |
7 ms |
468 KB |
Output is correct |
| 65 |
Correct |
11 ms |
856 KB |
Output is correct |
| 66 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 67 |
Partially correct |
10 ms |
344 KB |
Output is partially correct |
| 68 |
Partially correct |
9 ms |
344 KB |
Output is partially correct |
| 69 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 70 |
Partially correct |
9 ms |
600 KB |
Output is partially correct |
| 71 |
Correct |
7 ms |
460 KB |
Output is correct |
| 72 |
Correct |
7 ms |
456 KB |
Output is correct |
| 73 |
Correct |
10 ms |
468 KB |
Output is correct |
| 74 |
Correct |
9 ms |
344 KB |
Output is correct |
| 75 |
Partially correct |
7 ms |
344 KB |
Output is partially correct |
| 76 |
Partially correct |
8 ms |
344 KB |
Output is partially correct |
| 77 |
Correct |
6 ms |
344 KB |
Output is correct |
| 78 |
Correct |
7 ms |
344 KB |
Output is correct |
| 79 |
Correct |
6 ms |
344 KB |
Output is correct |
| 80 |
Partially correct |
11 ms |
344 KB |
Output is partially correct |
| 81 |
Partially correct |
9 ms |
456 KB |
Output is partially correct |
| 82 |
Partially correct |
7 ms |
420 KB |
Output is partially correct |
