oj.uz

Submission #961753

# Submission time Handle Problem Language Result Execution time Memory
961753 2024-04-12T12:06:51 Z Prieved1 Longest Trip (IOI23_longesttrip) C++17
15 / 100
 36 ms 3952 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=0;
          while(t[1].size()) {
            t[0].push_back(t[1].back());
            t[1].pop_back();
          }
          t[1].push_back(i);
        }
      }
      assert(cnt<380);
      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:120:26: 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:124:25: 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 1 ms 344 KB Output is correct
2 Correct 8 ms 3928 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 9 ms 344 KB Output is correct
3 Correct 11 ms 344 KB Output is correct
4 Correct 14 ms 1108 KB Output is correct
5 Correct 29 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 7 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 24 ms 3672 KB Output is correct
6 Correct 7 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 15 ms 856 KB Output is correct
10 Correct 29 ms 3672 KB Output is correct
11 Correct 28 ms 3672 KB Output is correct
12 Correct 28 ms 3520 KB Output is correct
13 Correct 29 ms 3952 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 7 ms 344 KB Output is correct
3 Correct 10 ms 344 KB Output is correct
4 Correct 15 ms 1112 KB Output is correct
5 Correct 28 ms 3524 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 8 ms 344 KB Output is correct
8 Correct 9 ms 344 KB Output is correct
9 Correct 13 ms 856 KB Output is correct
10 Correct 36 ms 3928 KB Output is correct
11 Correct 29 ms 3588 KB Output is correct
12 Correct 26 ms 3672 KB Output is correct
13 Correct 24 ms 3832 KB Output is correct
14 Correct 10 ms 344 KB Output is correct
15 Correct 11 ms 596 KB Output is correct
16 Incorrect 2 ms 344 KB Incorrect
17 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 6 ms 600 KB Output is correct
3 Correct 9 ms 344 KB Output is correct
4 Correct 16 ms 1112 KB Output is correct
5 Correct 30 ms 3284 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 8 ms 344 KB Output is correct
8 Correct 9 ms 344 KB Output is correct
9 Correct 14 ms 856 KB Output is correct
10 Correct 28 ms 3928 KB Output is correct
11 Correct 26 ms 3928 KB Output is correct
12 Correct 30 ms 3508 KB Output is correct
13 Correct 28 ms 3728 KB Output is correct
14 Correct 10 ms 344 KB Output is correct
15 Correct 11 ms 344 KB Output is correct
16 Incorrect 6 ms 344 KB Incorrect
17 Halted 0 ms 0 KB -