oj.uz

Submission #1059859

# Submission time Handle Problem Language Result Execution time Memory
1059859 2024-08-15T08:43:28 Z mychecksedad Longest Trip (IOI23_longesttrip) C++17
15 / 100
 891 ms 1320 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()])
        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;
      }
      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 198 ms 924 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 0 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 5 ms 344 KB Output is correct
3 Correct 6 ms 344 KB Output is correct
4 Correct 3 ms 344 KB Output is correct
5 Correct 5 ms 344 KB Output is correct
6 Correct 5 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 5 ms 344 KB Output is correct
10 Correct 5 ms 344 KB Output is correct
11 Correct 5 ms 436 KB Output is correct
12 Correct 7 ms 344 KB Output is correct
13 Correct 5 ms 344 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 344 KB Output is correct
2 Correct 22 ms 344 KB Output is correct
3 Correct 173 ms 444 KB Output is correct
4 Correct 437 ms 728 KB Output is correct
5 Correct 815 ms 924 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 27 ms 344 KB Output is correct
8 Correct 162 ms 600 KB Output is correct
9 Correct 319 ms 732 KB Output is correct
10 Correct 802 ms 884 KB Output is correct
11 Correct 891 ms 908 KB Output is correct
12 Correct 828 ms 992 KB Output is correct
13 Correct 807 ms 1320 KB Output is correct
14 Correct 9 ms 344 KB Output is correct
15 Correct 14 ms 344 KB Output is correct
16 Incorrect 16 ms 596 KB Incorrect
17 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 22 ms 344 KB Output is correct
3 Partially correct 156 ms 456 KB Output is partially correct
4 Partially correct 410 ms 592 KB Output is partially correct
5 Partially correct 815 ms 1208 KB Output is partially correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 20 ms 344 KB Output is correct
8 Partially correct 145 ms 460 KB Output is partially correct
9 Partially correct 272 ms 600 KB Output is partially correct
10 Partially correct 774 ms 900 KB Output is partially correct
11 Partially correct 864 ms 740 KB Output is partially correct
12 Partially correct 839 ms 772 KB Output is partially correct
13 Partially correct 847 ms 964 KB Output is partially correct
14 Correct 6 ms 344 KB Output is correct
15 Correct 12 ms 344 KB Output is correct
16 Incorrect 17 ms 344 KB Incorrect
17 Halted 0 ms 0 KB -