oj.uz

Submission #1059811

# Submission time Handle Problem Language Result Execution time Memory
1059811 2024-08-15T08:25:01 Z mychecksedad Longest Trip (IOI23_longesttrip) C++17
15 / 100
 850 ms 1260 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() == 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];
  }
  vi res;
  int o = 0, cur = 0;
  for(int i = 0; i < S.size(); ++i){
    if(S[i].size() == 1){
      // ++cur;
      if(o == 0){
        // S[0].swap(S[i]);
        ++o;
      }else if(o == 1){
        // S.back().swap(S[i]);
        ++o;
        // break;
      }else{
        assert(false);
      }
    }
  }
  for(int i = 0; i < S.size(); ++i){
    if(S[i].size() == 1){
      res.pb(S[i][0]);
      continue;
    }
    vi nxt;
    if(i + 1 < S.size()){
      nxt = S[i + 1];
    }
    if(nxt.empty()){
      for(int x: S[i]) res.pb(x);
    }else{
      bool ok = 0;
      for(int j = 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:103:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |   for(int i = 0; i < S.size(); ++i){
      |                  ~~^~~~~~~~~~
longesttrip.cpp:118:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |   for(int i = 0; i < S.size(); ++i){
      |                  ~~^~~~~~~~~~
longesttrip.cpp:124:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  124 |     if(i + 1 < S.size()){
      |        ~~~~~~^~~~~~~~~~
longesttrip.cpp:131:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  131 |       for(int j = 1; j < S[i].size(); ++j){
      |                      ~~^~~~~~~~~~~~~
longesttrip.cpp:132:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  132 |         for(int l = 0; l < S[i + 1].size(); ++l){
      |                        ~~^~~~~~~~~~~~~~~~~
longesttrip.cpp:102:14: warning: unused variable 'cur' [-Wunused-variable]
  102 |   int o = 0, cur = 0;
      |              ^~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 186 ms 916 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 5 ms 344 KB Output is correct
3 Correct 6 ms 340 KB Output is correct
4 Correct 4 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 5 ms 344 KB Output is correct
10 Correct 7 ms 344 KB Output is correct
11 Correct 7 ms 344 KB Output is correct
12 Correct 5 ms 432 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 6 ms 344 KB Output is correct
2 Correct 22 ms 344 KB Output is correct
3 Correct 140 ms 596 KB Output is correct
4 Correct 373 ms 344 KB Output is correct
5 Correct 812 ms 980 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 30 ms 344 KB Output is correct
8 Correct 138 ms 444 KB Output is correct
9 Correct 286 ms 716 KB Output is correct
10 Correct 808 ms 736 KB Output is correct
11 Correct 809 ms 1232 KB Output is correct
12 Correct 850 ms 848 KB Output is correct
13 Correct 819 ms 1260 KB Output is correct
14 Correct 5 ms 344 KB Output is correct
15 Incorrect 2 ms 344 KB Incorrect
16 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 344 KB Output is correct
2 Correct 26 ms 344 KB Output is correct
3 Partially correct 163 ms 440 KB Output is partially correct
4 Partially correct 389 ms 616 KB Output is partially correct
5 Partially correct 810 ms 1148 KB Output is partially correct
6 Correct 5 ms 344 KB Output is correct
7 Correct 22 ms 344 KB Output is correct
8 Partially correct 148 ms 440 KB Output is partially correct
9 Partially correct 277 ms 480 KB Output is partially correct
10 Partially correct 781 ms 1220 KB Output is partially correct
11 Partially correct 845 ms 980 KB Output is partially correct
12 Partially correct 702 ms 804 KB Output is partially correct
13 Partially correct 792 ms 860 KB Output is partially correct
14 Correct 7 ms 344 KB Output is correct
15 Incorrect 2 ms 344 KB Incorrect
16 Halted 0 ms 0 KB -