oj.uz

Submission #961660

# Submission time Handle Problem Language Result Execution time Memory
961660 2024-04-12T09:44:28 Z Prieved1 Longest Trip (IOI23_longesttrip) C++17
15 / 100
 35 ms 7104 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);
      connected=false;
    }
    else {
      connected=1;
      while(t[1].size()) {
        t[0].push_back(t[1].back());
        t[1].pop_back();
      }
      t[1].push_back(i);
    }
  }
  assert(cnt<300);
  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:120:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |   for(int j = res+1;j<t[0].size();j++) {
      |                     ~^~~~~~~~~~~~
longesttrip.cpp:124:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  124 |   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 0 ms 344 KB Output is correct
2 Correct 9 ms 3976 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 7 ms 516 KB Output is correct
3 Correct 9 ms 344 KB Output is correct
4 Correct 16 ms 1476 KB Output is correct
5 Correct 29 ms 4272 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 8 ms 344 KB Output is correct
3 Correct 9 ms 596 KB Output is correct
4 Correct 16 ms 1624 KB Output is correct
5 Correct 29 ms 3416 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 8 ms 344 KB Output is correct
8 Correct 10 ms 344 KB Output is correct
9 Correct 12 ms 856 KB Output is correct
10 Correct 25 ms 3712 KB Output is correct
11 Correct 30 ms 3928 KB Output is correct
12 Correct 35 ms 3672 KB Output is correct
13 Correct 29 ms 3924 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 6 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 15 ms 1112 KB Output is correct
5 Correct 27 ms 3416 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 6 ms 344 KB Output is correct
8 Correct 9 ms 344 KB Output is correct
9 Correct 14 ms 1112 KB Output is correct
10 Correct 28 ms 3964 KB Output is correct
11 Correct 27 ms 3672 KB Output is correct
12 Correct 27 ms 3928 KB Output is correct
13 Correct 28 ms 3600 KB Output is correct
14 Correct 10 ms 596 KB Output is correct
15 Correct 8 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 10 ms 504 KB Output is correct
19 Correct 18 ms 988 KB Output is correct
20 Correct 14 ms 856 KB Output is correct
21 Correct 27 ms 3804 KB Output is correct
22 Correct 29 ms 4036 KB Output is correct
23 Correct 32 ms 3740 KB Output is correct
24 Correct 31 ms 3672 KB Output is correct
25 Correct 9 ms 344 KB Output is correct
26 Correct 9 ms 344 KB Output is correct
27 Correct 7 ms 344 KB Output is correct
28 Correct 11 ms 344 KB Output is correct
29 Correct 9 ms 344 KB Output is correct
30 Correct 12 ms 444 KB Output is correct
31 Correct 13 ms 440 KB Output is correct
32 Correct 13 ms 960 KB Output is correct
33 Correct 15 ms 856 KB Output is correct
34 Correct 15 ms 1112 KB Output is correct
35 Correct 18 ms 856 KB Output is correct
36 Correct 29 ms 3416 KB Output is correct
37 Runtime error 11 ms 7000 KB Execution killed with signal 6
38 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 540 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 10 ms 344 KB Output is correct
4 Correct 17 ms 1188 KB Output is correct
5 Correct 26 ms 3672 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 9 ms 344 KB Output is correct
8 Correct 11 ms 856 KB Output is correct
9 Correct 12 ms 856 KB Output is correct
10 Correct 27 ms 3672 KB Output is correct
11 Correct 28 ms 3672 KB Output is correct
12 Correct 25 ms 3428 KB Output is correct
13 Correct 26 ms 3416 KB Output is correct
14 Correct 11 ms 344 KB Output is correct
15 Correct 8 ms 344 KB Output is correct
16 Correct 7 ms 344 KB Output is correct
17 Correct 9 ms 344 KB Output is correct
18 Correct 11 ms 344 KB Output is correct
19 Correct 15 ms 856 KB Output is correct
20 Correct 15 ms 1112 KB Output is correct
21 Correct 9 ms 344 KB Output is correct
22 Correct 12 ms 344 KB Output is correct
23 Correct 9 ms 344 KB Output is correct
24 Correct 8 ms 344 KB Output is correct
25 Correct 7 ms 344 KB Output is correct
26 Correct 13 ms 440 KB Output is correct
27 Correct 12 ms 440 KB Output is correct
28 Correct 12 ms 436 KB Output is correct
29 Correct 15 ms 1368 KB Output is correct
30 Correct 16 ms 1368 KB Output is correct
31 Correct 17 ms 856 KB Output is correct
32 Correct 7 ms 344 KB Output is correct
33 Correct 8 ms 508 KB Output is correct
34 Correct 8 ms 344 KB Output is correct
35 Correct 10 ms 344 KB Output is correct
36 Correct 8 ms 344 KB Output is correct
37 Correct 14 ms 440 KB Output is correct
38 Correct 14 ms 436 KB Output is correct
39 Correct 15 ms 440 KB Output is correct
40 Correct 14 ms 1112 KB Output is correct
41 Correct 17 ms 1112 KB Output is correct
42 Correct 18 ms 904 KB Output is correct
43 Correct 26 ms 3520 KB Output is correct
44 Correct 30 ms 3804 KB Output is correct
45 Correct 28 ms 3592 KB Output is correct
46 Correct 32 ms 3504 KB Output is correct
47 Correct 27 ms 3672 KB Output is correct
48 Runtime error 10 ms 7104 KB Execution killed with signal 6
49 Halted 0 ms 0 KB -