oj.uz

Submission #961653

# Submission time Handle Problem Language Result Execution time Memory
961653 2024-04-12T09:37:39 Z Prieved1 Longest Trip (IOI23_longesttrip) C++17
100 / 100
 44 ms 4392 KB 
#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
int cnt=0;
int n;
map<int, map<int,int>> mp;
bool query1(int a, int b) {
  if(mp[a][b]!=0)return mp[a][b]-1;
  int c=are_connected({a}, {b});
  mp[a][b]=c+1;
  mp[b][a]=c+1;
  cnt++;
  return c;
}
bool query2(int a, int b) {
 for(int j  = 0;j<n;j++) {
  if(a==j or j==b)continue;
  if(mp[a][j]==1 and mp[j][b]==1) {
    mp[a][b]=2;
    mp[b][a]=2;
    return 1;
  }
 }
 return query1(a,b);
}
vector<int> longest_trip(int N, int D)
{
  n=N;
  cnt=0;
  mp.clear();
  srand(time(NULL));
  vector<int> id(N);
  iota(id.begin(), id.end(), 0);
  random_shuffle(id.begin(), id.end());
  vector<int> t[2];
  t[0].push_back(id[0]);
  t[1].push_back(id[1]);
  bool connected=1;
  for(int ii = 2;ii<N;ii++) {
    int i=id[ii];
    if(t[0].size() < t[1].size())swap(t[0], t[1]);
    if(t[1].size()>0 and rand()%2) {
      swap(t[0], t[1]);
    }
    if(query2(i, t[0].back())) {
      t[0].push_back(i);
      connected=1;
    }
    else if(connected==false or query2(i, t[1].back())) {
      t[1].push_back(i);
    }
    else {
      connected=1;
      while(t[1].size()) {
        t[0].push_back(t[1].back());
        t[1].pop_back();
      }
      t[1].push_back(i);
    }
  }
  if(t[0].size()<t[1].size())swap(t[0], t[1]);
  if(t[1].size()==0)return t[0];
  if(query2(t[0][0], t[1].back())) {
    reverse(t[0].begin(), t[0].end());
    while(t[1].size()) {
      t[0].push_back(t[1].back());
      t[1].pop_back();
    }
    return t[0];
  }
  if(query2(t[0][0], t[1][0])) {
    reverse(t[0].begin(), t[0].end());
    reverse(t[1].begin(), t[1].end());
    while(t[1].size()) {
      t[0].push_back(t[1].back());
      t[1].pop_back();
    }
    return t[0];
  }
  if(query2(t[0].back(), t[1][0])) {
    reverse(t[1].begin(), t[1].end());
    while(t[1].size()) {
      t[0].push_back(t[1].back());
      t[1].pop_back();
    }
    return t[0];
  }
  if(are_connected(t[0], t[1])==false)return t[0];
  int lo = 0, hi = t[0].size()-1;
  int res=hi;
  while(lo <= hi) {
    int mid=(lo+hi)/2;
    vector<int> tmp;
    for(int j = 0;j<=mid;j++)tmp.push_back(t[0][j]);
    if(are_connected(tmp, t[1])) {
      res=mid;
      hi=mid-1;
    }
    else{
      lo=mid+1;
    }
  }
  lo=0, hi=t[1].size()-1;
  int res2=hi;
  while(lo <= hi) {
    int mid=(lo+hi)/2;
    vector<int> tmp;
    for(int j = 0;j<=mid;j++)tmp.push_back(t[1][j]);
    if(are_connected(tmp, {t[0][res]})) {
      res2=mid;
      hi=mid-1;
    }
    else{
      lo=mid+1;
    }
  }
  vector<int> ans;
  for(int j = res+1;j<t[0].size();j++) {
    ans.push_back(t[0][j]);
  }
  for(int j = 0;j<=res;j++)ans.push_back(t[0][j]);
  for(int j = res2;j<t[1].size();j++)ans.push_back(t[1][j]);
  for(int j = 0;j<res2;j++)ans.push_back(t[1][j]);
  return ans;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:118:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |   for(int j = res+1;j<t[0].size();j++) {
      |                     ~^~~~~~~~~~~~
longesttrip.cpp:122:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  122 |   for(int j = res2;j<t[1].size();j++)ans.push_back(t[1][j]);
      |                    ~^~~~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 9 ms 3684 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 9 ms 344 KB Output is correct
4 Correct 17 ms 1620 KB Output is correct
5 Correct 27 ms 3416 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 10 ms 344 KB Output is correct
4 Correct 15 ms 1364 KB Output is correct
5 Correct 26 ms 4184 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 9 ms 340 KB Output is correct
8 Correct 10 ms 344 KB Output is correct
9 Correct 14 ms 856 KB Output is correct
10 Correct 25 ms 4184 KB Output is correct
11 Correct 31 ms 3948 KB Output is correct
12 Correct 27 ms 4184 KB Output is correct
13 Correct 27 ms 3648 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 8 ms 600 KB Output is correct
3 Correct 9 ms 344 KB Output is correct
4 Correct 18 ms 1112 KB Output is correct
5 Correct 30 ms 3976 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 7 ms 344 KB Output is correct
8 Correct 9 ms 344 KB Output is correct
9 Correct 17 ms 856 KB Output is correct
10 Correct 27 ms 3928 KB Output is correct
11 Correct 30 ms 3928 KB Output is correct
12 Correct 26 ms 3672 KB Output is correct
13 Correct 27 ms 4220 KB Output is correct
14 Correct 9 ms 344 KB Output is correct
15 Correct 7 ms 344 KB Output is correct
16 Correct 9 ms 344 KB Output is correct
17 Correct 11 ms 344 KB Output is correct
18 Correct 11 ms 600 KB Output is correct
19 Correct 17 ms 1088 KB Output is correct
20 Correct 15 ms 1112 KB Output is correct
21 Correct 29 ms 4024 KB Output is correct
22 Correct 32 ms 3692 KB Output is correct
23 Correct 31 ms 3928 KB Output is correct
24 Correct 31 ms 3684 KB Output is correct
25 Correct 10 ms 344 KB Output is correct
26 Correct 11 ms 352 KB Output is correct
27 Correct 12 ms 344 KB Output is correct
28 Correct 8 ms 344 KB Output is correct
29 Correct 7 ms 344 KB Output is correct
30 Correct 13 ms 436 KB Output is correct
31 Correct 13 ms 436 KB Output is correct
32 Correct 15 ms 600 KB Output is correct
33 Correct 16 ms 856 KB Output is correct
34 Correct 18 ms 856 KB Output is correct
35 Correct 15 ms 856 KB Output is correct
36 Correct 33 ms 3928 KB Output is correct
37 Correct 34 ms 3928 KB Output is correct
38 Correct 37 ms 3836 KB Output is correct
39 Correct 36 ms 3336 KB Output is correct
40 Correct 33 ms 3540 KB Output is correct
41 Correct 32 ms 3668 KB Output is correct
42 Correct 37 ms 3784 KB Output is correct
43 Correct 36 ms 3776 KB Output is correct
44 Correct 38 ms 3592 KB Output is correct
45 Correct 7 ms 344 KB Output is correct
46 Correct 11 ms 344 KB Output is correct
47 Correct 9 ms 344 KB Output is correct
48 Correct 10 ms 344 KB Output is correct
49 Correct 10 ms 600 KB Output is correct
50 Correct 13 ms 1076 KB Output is correct
51 Correct 17 ms 700 KB Output is correct
52 Correct 15 ms 628 KB Output is correct
53 Correct 20 ms 1184 KB Output is correct
54 Correct 18 ms 996 KB Output is correct
55 Correct 21 ms 1364 KB Output is correct
56 Correct 41 ms 3520 KB Output is correct
57 Correct 40 ms 3920 KB Output is correct
58 Correct 37 ms 3880 KB Output is correct
59 Correct 39 ms 3652 KB Output is correct
60 Correct 39 ms 3916 KB Output is correct
61 Correct 40 ms 4152 KB Output is correct
62 Correct 41 ms 3784 KB Output is correct
63 Correct 44 ms 3648 KB Output is correct
64 Correct 40 ms 3760 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 12 ms 344 KB Output is correct
4 Correct 18 ms 1112 KB Output is correct
5 Correct 31 ms 3928 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 7 ms 344 KB Output is correct
8 Correct 10 ms 344 KB Output is correct
9 Correct 17 ms 856 KB Output is correct
10 Correct 29 ms 3440 KB Output is correct
11 Correct 32 ms 4332 KB Output is correct
12 Correct 28 ms 3852 KB Output is correct
13 Correct 29 ms 3416 KB Output is correct
14 Correct 10 ms 344 KB Output is correct
15 Correct 9 ms 344 KB Output is correct
16 Correct 9 ms 344 KB Output is correct
17 Correct 10 ms 344 KB Output is correct
18 Correct 12 ms 600 KB Output is correct
19 Correct 18 ms 1112 KB Output is correct
20 Correct 16 ms 908 KB Output is correct
21 Correct 9 ms 344 KB Output is correct
22 Correct 9 ms 344 KB Output is correct
23 Correct 7 ms 344 KB Output is correct
24 Correct 7 ms 344 KB Output is correct
25 Correct 7 ms 344 KB Output is correct
26 Correct 12 ms 436 KB Output is correct
27 Correct 14 ms 948 KB Output is correct
28 Correct 15 ms 696 KB Output is correct
29 Correct 16 ms 1108 KB Output is correct
30 Correct 16 ms 1112 KB Output is correct
31 Correct 15 ms 864 KB Output is correct
32 Correct 8 ms 344 KB Output is correct
33 Correct 8 ms 344 KB Output is correct
34 Correct 9 ms 344 KB Output is correct
35 Correct 11 ms 344 KB Output is correct
36 Correct 9 ms 344 KB Output is correct
37 Correct 12 ms 436 KB Output is correct
38 Correct 14 ms 440 KB Output is correct
39 Correct 15 ms 696 KB Output is correct
40 Correct 17 ms 1268 KB Output is correct
41 Correct 17 ms 904 KB Output is correct
42 Correct 16 ms 856 KB Output is correct
43 Correct 28 ms 3612 KB Output is correct
44 Correct 28 ms 3496 KB Output is correct
45 Correct 30 ms 3712 KB Output is correct
46 Correct 27 ms 3652 KB Output is correct
47 Correct 35 ms 3872 KB Output is correct
48 Correct 34 ms 3672 KB Output is correct
49 Correct 36 ms 3476 KB Output is correct
50 Correct 32 ms 3928 KB Output is correct
51 Correct 34 ms 3516 KB Output is correct
52 Correct 35 ms 3672 KB Output is correct
53 Correct 33 ms 3812 KB Output is correct
54 Correct 36 ms 3416 KB Output is correct
55 Correct 34 ms 3672 KB Output is correct
56 Correct 35 ms 3928 KB Output is correct
57 Correct 33 ms 3416 KB Output is correct
58 Correct 35 ms 3872 KB Output is correct
59 Correct 35 ms 3672 KB Output is correct
60 Correct 40 ms 3644 KB Output is correct
61 Correct 38 ms 4120 KB Output is correct
62 Correct 28 ms 3968 KB Output is correct
63 Correct 36 ms 3888 KB Output is correct
64 Correct 34 ms 3988 KB Output is correct
65 Correct 31 ms 3980 KB Output is correct
66 Correct 38 ms 3700 KB Output is correct
67 Correct 39 ms 4392 KB Output is correct
68 Correct 37 ms 3868 KB Output is correct
69 Correct 37 ms 4348 KB Output is correct
70 Correct 34 ms 3908 KB Output is correct
71 Correct 32 ms 4080 KB Output is correct
72 Correct 35 ms 4024 KB Output is correct
73 Correct 35 ms 4016 KB Output is correct
74 Correct 37 ms 3928 KB Output is correct
75 Correct 33 ms 3580 KB Output is correct
76 Correct 35 ms 3744 KB Output is correct
77 Correct 30 ms 3716 KB Output is correct
78 Correct 40 ms 3768 KB Output is correct
79 Correct 37 ms 3984 KB Output is correct
80 Correct 34 ms 3992 KB Output is correct
81 Correct 33 ms 4196 KB Output is correct
82 Correct 34 ms 4096 KB Output is correct