oj.uz

Submission #1059879

# Submission time Handle Problem Language Result Execution time Memory
1059879 2024-08-15T08:53:16 Z mychecksedad Longest Trip (IOI23_longesttrip) C++17
15 / 100
 896 ms 1404 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;
      }
      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 194 ms 992 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 1 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 6 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 8 ms 344 KB Output is correct
4 Correct 6 ms 344 KB Output is correct
5 Correct 6 ms 344 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 6 ms 344 KB Output is correct
8 Correct 7 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 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 25 ms 344 KB Output is correct
3 Correct 159 ms 344 KB Output is correct
4 Correct 389 ms 500 KB Output is correct
5 Correct 806 ms 1200 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 21 ms 344 KB Output is correct
8 Correct 154 ms 592 KB Output is correct
9 Correct 308 ms 724 KB Output is correct
10 Correct 823 ms 1056 KB Output is correct
11 Correct 827 ms 1256 KB Output is correct
12 Correct 828 ms 988 KB Output is correct
13 Correct 795 ms 1180 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Correct 13 ms 344 KB Output is correct
16 Incorrect 15 ms 344 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 23 ms 344 KB Output is correct
3 Partially correct 157 ms 440 KB Output is partially correct
4 Partially correct 386 ms 600 KB Output is partially correct
5 Partially correct 883 ms 1404 KB Output is partially correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 22 ms 344 KB Output is correct
8 Partially correct 152 ms 436 KB Output is partially correct
9 Partially correct 301 ms 744 KB Output is partially correct
10 Partially correct 819 ms 952 KB Output is partially correct
11 Partially correct 841 ms 1144 KB Output is partially correct
12 Partially correct 824 ms 736 KB Output is partially correct
13 Partially correct 896 ms 744 KB Output is partially correct
14 Correct 9 ms 344 KB Output is correct
15 Correct 11 ms 344 KB Output is correct
16 Incorrect 19 ms 344 KB Incorrect
17 Halted 0 ms 0 KB -