oj.uz

답안 #1059828

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1059828 2024-08-15T08:32:59 Z mychecksedad 가장 긴 여행 (IOI23_longesttrip) C++17
15 / 100
 849 ms 1392 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;
  for(int i = 0; i < S.size(); ++i){
    if(S[i].size() == 1){
      if(o == 0){
        S[0].swap(S[i]);
        ++o;
      }else if(o == 1){
        S.back().swap(S[i]);
        o += 2;
        break;
      }
    }
  }
  if(o == 1){
    bool ok = 0;
    for(int i = 1; i < S.size(); ++i){
      for(int x: S[i]){
        if(is[x][S[0][0]]){
          ok = 1;
          break;
        }
      }
      if(ok){
        S[1].swap(S[i]);
        break;
      }
    }
    if(!ok) assert(false);
  }else if(o == 2){
    for(int i = 0; i + 1 < S.size(); ++i){
      bool ok = 0;
      for(int x: S[i]){
        if(is[x][S.back()[0]]){
          ok = 1;
          break;
        }
      }
      if(ok){
        S[int(S.size()) - 2].swap(S[i]);
        break;
      }
    }
  }else if(o == 3 && S.size() > 3){
    vector<bool> b(S.size());
    vector<bool> b2(S.size());
    for(int i = 1; i < S.size(); ++i){
      bool ok = 0;
      for(int x: S[i]){
        if(is[x][S[0][0]]){
          ok = 1;
          break;
        }
      }
      if(ok){
        b[i] = 1;
      }
    }
    for(int i = 0; i + 1 < S.size(); ++i){
      bool ok = 0;
      for(int x: S[i]){
        if(is[x][S.back()[0]]){
          ok = 1;
          break;
        }
      }
      if(ok){
        b2[i] = 1;
        break;
      }
    }
    bool okk = 0;
    for(int i = 0; i < S.size(); ++i){
      for(int j = 0; j < S.size(); ++j){
        if(i == j) continue;
        if(b[i] && b2[j]){
          S[i].swap(S[1]);
          if(j == 1){
            S[int(S.size()) - 2].swap(S[i]);
          }else{
            S[int(S.size()) - 2].swap(S[j]);
          }
          okk = 1;
          break;
        }
      }
      if(okk) break;
    }
    if(!okk) 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:117:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  117 |     for(int i = 1; i < S.size(); ++i){
      |                    ~~^~~~~~~~~~
longesttrip.cpp:131:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  131 |     for(int i = 0; i + 1 < S.size(); ++i){
      |                    ~~~~~~^~~~~~~~~~
longesttrip.cpp:147:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  147 |     for(int i = 1; i < S.size(); ++i){
      |                    ~~^~~~~~~~~~
longesttrip.cpp:159:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  159 |     for(int i = 0; i + 1 < S.size(); ++i){
      |                    ~~~~~~^~~~~~~~~~
longesttrip.cpp:173:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  173 |     for(int i = 0; i < S.size(); ++i){
      |                    ~~^~~~~~~~~~
longesttrip.cpp:174:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  174 |       for(int j = 0; j < S.size(); ++j){
      |                      ~~^~~~~~~~~~
longesttrip.cpp:191:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  191 |   for(int i = 0; i < S.size(); ++i){
      |                  ~~^~~~~~~~~~
longesttrip.cpp:197:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  197 |     if(i + 1 < S.size()){
      |        ~~~~~~^~~~~~~~~~
longesttrip.cpp:204:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  204 |       for(int j = 1; j < S[i].size(); ++j){
      |                      ~~^~~~~~~~~~~~~
longesttrip.cpp:205:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  205 |         for(int l = 0; l < S[i + 1].size(); ++l){
      |                        ~~^~~~~~~~~~~~~~~~~

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 183 ms 892 KB Output is correct

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 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

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 5 ms 340 KB Output is correct
4 Correct 6 ms 344 KB Output is correct
5 Correct 5 ms 344 KB Output is correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 4 ms 344 KB Output is correct
9 Correct 3 ms 344 KB Output is correct
10 Correct 4 ms 344 KB Output is correct
11 Correct 7 ms 344 KB Output is correct
12 Correct 5 ms 440 KB Output is correct
13 Correct 8 ms 600 KB Output is correct

Subtask #3
0.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 344 KB Output is correct
2 Correct 31 ms 344 KB Output is correct
3 Correct 155 ms 444 KB Output is correct
4 Correct 391 ms 724 KB Output is correct
5 Correct 814 ms 948 KB Output is correct
6 Correct 5 ms 344 KB Output is correct
7 Correct 20 ms 344 KB Output is correct
8 Correct 127 ms 344 KB Output is correct
9 Correct 286 ms 592 KB Output is correct
10 Correct 830 ms 956 KB Output is correct
11 Correct 816 ms 988 KB Output is correct
12 Correct 831 ms 992 KB Output is correct
13 Correct 829 ms 1092 KB Output is correct
14 Correct 10 ms 596 KB Output is correct
15 Incorrect 1 ms 344 KB Incorrect
16 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 30 ms 344 KB Output is correct
3 Partially correct 152 ms 460 KB Output is partially correct
4 Partially correct 438 ms 964 KB Output is partially correct
5 Partially correct 797 ms 1020 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 147 ms 344 KB Output is partially correct
9 Partially correct 317 ms 600 KB Output is partially correct
10 Partially correct 815 ms 1252 KB Output is partially correct
11 Partially correct 805 ms 1072 KB Output is partially correct
12 Partially correct 849 ms 984 KB Output is partially correct
13 Partially correct 807 ms 1392 KB Output is partially correct
14 Correct 8 ms 340 KB Output is correct
15 Incorrect 1 ms 344 KB Incorrect
16 Halted 0 ms 0 KB -