oj.uz

Submission #1059882

# Submission time Handle Problem Language Result Execution time Memory
1059882 2024-08-15T08:53:58 Z mychecksedad Longest Trip (IOI23_longesttrip) C++17
15 / 100
 867 ms 1172 KB 
#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define all(x) x.begin(),x.end()
#define ll long long
#define ff first
#define ss second
#define vi vector<int>
const int N = 200005;
 
std::vector<int> longest_trip(int n, int D)
{
  if(D == 3){
    vector<int> v;
    for(int i = 0; i < n; ++i) v.pb(i);
    return v;
  }
  if(D == 2){
    deque<int> v;
    v.pb(0);
    int o = -1;
    for(int i = 1; i < n; ++i){
      bool x = are_connected(vi{0}, vi{i});
      if(x){
        o = i;
        v.pb(i);
        break;
      }
    }
    if(o == -1){
      vi res;
      for(int i = 1; i < n; ++i){
        res.pb(i);
      }
      return res;
    }
    for(int i = 1; i < n; ++i){
      if(o == i) continue;
      bool x = are_connected(vi{v[0]}, vi{i});
      if(x){
        v.push_front(i);
      }else v.pb(i);
    }
    vector<int> res(all(v));
    return res;
  }
  vector<vector<int>> g(n);
  vector<vector<bool>> is(n, vector<bool>(n));
  for(int i = 0; i < n; ++i){
    for(int j = i + 1; j < n; ++j){
      bool ok = are_connected(vi{i}, vi{j});
      if(ok){
        is[i][j] = is[j][i] = 1;
        g[i].pb(j);
        g[j].pb(i);
      }
    }
  }
  vector<vector<int>> S;
  for(int i = 0; i < n; ++i){
    if(g[i].empty()){
      vi res;
      for(int j = 0; j < n; ++j){
        if(j != i) res.pb(j);
      }
      return res;
    }
    bool okk = 0;
    for(auto &s: S){
      bool ok = 1;
      for(int x: s){
        if(is[x][i] == 0) ok = 0;
      }
      if(ok == 1){
        s.pb(i);
        okk = 1;
        break;
      }
    }
    if(okk == 0){
      S.pb(vi{i});
    }
  }
  if(S.size() == 1) return S[0];
  if(S.size() == 2){
    for(int &x: S[0]){
      for(int &y: S[1]){
        if(is[x][y]){
          swap(x, S[0].back());
          swap(y, S[1][0]);
          vi res;
          for(int f: S[0]) res.pb(f);
          for(int f: S[1]) res.pb(f);
          return res;
        }   
      }
    }
    if(S[0].size() > S[1].size()) return S[0];
    return S[1];
  }
  int s = S.size();
  vector<vector<bool>> si(s, vector<bool>(s));
  for(int i = 0; i < s; ++i){
    for(int j = i + 1; j < s; ++j){
       bool ok = 0;
       for(int x: S[i]){
        for(int y: S[j]){
            if(is[x][y]) ok = 1;
        }
       }
       si[i][j] = si[j][i] = ok;
    }
  }
  deque<int> v;
    v.pb(0);
    int o = -1;
    for(int i = 1; i < s; ++i){
      bool x = si[0][i];
      if(x){
        o = i;
        v.pb(i);
        break;
      }
    }
    if(o == -1){
      assert(false);
    }
    for(int i = 1; i < s; ++i){
      if(o == i) continue;
      bool x = si[v[0]][i];
      if(x){
        v.push_front(i);
      }else{
        assert(si[v.back()][i]);
        v.pb(i);
      }
    }
  
  vector<vector<int>> SS(s);
  for(int i = 0; i < s; ++i) SS[i] = S[v[i]];
  SS.swap(S);

  vi res;
  for(int i = 0; i < S.size(); ++i){
    if(i + 1 == S.size()){
      for(int x: S[i]) res.pb(x);
    }else{
      bool ok = 0;
      for(int j = (int(S[i].size() == 1 ? 0 : 1)); j < S[i].size(); ++j){
        for(int l = 0; l < S[i + 1].size(); ++l){
          if(is[S[i][j]][S[i + 1][l]]){
            swap(S[i][j], S[i].back());
            swap(S[i + 1][l], S[i + 1][0]);
            ok = 1;
            break;
          }
        }
        if(ok) break;
      }
      if(!ok) assert(false);
      for(int x: S[i]) res.pb(x);
    }
  }
  return res;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:145:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  145 |   for(int i = 0; i < S.size(); ++i){
      |                  ~~^~~~~~~~~~
longesttrip.cpp:146:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  146 |     if(i + 1 == S.size()){
      |        ~~~~~~^~~~~~~~~~~
longesttrip.cpp:150:54: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  150 |       for(int j = (int(S[i].size() == 1 ? 0 : 1)); j < S[i].size(); ++j){
      |                                                    ~~^~~~~~~~~~~~~
longesttrip.cpp:151:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  151 |         for(int l = 0; l < S[i + 1].size(); ++l){
      |                        ~~^~~~~~~~~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 147 ms 1092 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 7 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 5 ms 344 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 5 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 7 ms 344 KB Output is correct
12 Correct 5 ms 344 KB Output is correct
13 Correct 7 ms 344 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 344 KB Output is correct
2 Correct 28 ms 344 KB Output is correct
3 Correct 122 ms 440 KB Output is correct
4 Correct 359 ms 504 KB Output is correct
5 Correct 682 ms 908 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 29 ms 344 KB Output is correct
8 Correct 162 ms 460 KB Output is correct
9 Correct 341 ms 728 KB Output is correct
10 Correct 852 ms 1172 KB Output is correct
11 Correct 713 ms 1008 KB Output is correct
12 Correct 778 ms 816 KB Output is correct
13 Correct 730 ms 888 KB Output is correct
14 Correct 8 ms 356 KB Output is correct
15 Correct 14 ms 448 KB Output is correct
16 Runtime error 21 ms 420 KB Execution killed with signal 6
17 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 356 KB Output is correct
2 Correct 26 ms 424 KB Output is correct
3 Partially correct 124 ms 704 KB Output is partially correct
4 Partially correct 378 ms 500 KB Output is partially correct
5 Partially correct 784 ms 912 KB Output is partially correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 29 ms 344 KB Output is correct
8 Partially correct 144 ms 440 KB Output is partially correct
9 Partially correct 315 ms 744 KB Output is partially correct
10 Partially correct 714 ms 876 KB Output is partially correct
11 Partially correct 747 ms 900 KB Output is partially correct
12 Partially correct 867 ms 1060 KB Output is partially correct
13 Partially correct 851 ms 1012 KB Output is partially correct
14 Correct 6 ms 344 KB Output is correct
15 Correct 9 ms 600 KB Output is correct
16 Runtime error 22 ms 592 KB Execution killed with signal 6
17 Halted 0 ms 0 KB -