oj.uz

Submission #1060341

# Submission time Handle Problem Language Result Execution time Memory
1060341 2024-08-15T13:08:22 Z mychecksedad Longest Trip (IOI23_longesttrip) C++17
15 / 100
 1000 ms 1348 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];
  }
  
  deque<int> a, b;
  a.pb(0);
  for(int i = 1; i < n; ++i){
    if(is[a[0]][i]){
      a.push_front(i);
    }else if(is[a.back()][i]){
      a.pb(i);
    }else{
      if(b.empty()) b.pb(i);
      else{
        if(is[b[0]][i]){
          b.push_front(i);
        }else if(is[b.back()][i]){
          b.pb(i);
        }else{
          if(is[a[0]][b[0]]){
            for(int x: b) a.push_front(x);
            b.clear();
            b.pb(i);
          }else{
            assert(false);
          }
        }
      }
    }
  }
  while(a.size() < n){
    if(is[a[0]][a.back()] == 0){
      if(is[a[0]][b.back()] == 1){
        a.push_front(b.back());
        b.pop_back();
      }else{
        a.pb(b.back());
        b.pop_back();
      }
    }else{
      bool ok = 1;
      for(int i = 0; i < a.size(); ++i){
        for(int j = i + 1; j < a.size(); ++j){
          int u = a[i], v = a[j];
          if(is[u][v] == 0){
            if(is[b.back()][u] == 1){
              while(a.front() != u){
                int x = a.front();
                a.pop_front();
                a.pb(x);
              }
              a.push_front(b.back());
              b.pop_back();
            }else{
              while(a.front() != v){
                int x = a.front();
                a.pop_front();
                a.pb(x);
              }
              a.push_front(b.back());
              b.pop_back();
            }
            ok = 1;
            break;
          }
        }
        
          if(ok) break;
      }
    }
  }
  vi res(all(a));
  return res;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:129:18: warning: comparison of integer expressions of different signedness: 'std::deque<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  129 |   while(a.size() < n){
      |         ~~~~~~~~~^~~
longesttrip.cpp:140:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  140 |       for(int i = 0; i < a.size(); ++i){
      |                      ~~^~~~~~~~~~
longesttrip.cpp:141:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  141 |         for(int j = i + 1; j < a.size(); ++j){
      |                            ~~^~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 203 ms 1348 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 1 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 7 ms 344 KB Output is correct
4 Correct 5 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 4 ms 344 KB Output is correct
8 Correct 4 ms 344 KB Output is correct
9 Correct 5 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 6 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 5 ms 344 KB Output is correct
2 Correct 27 ms 344 KB Output is correct
3 Correct 149 ms 436 KB Output is correct
4 Correct 411 ms 1200 KB Output is correct
5 Correct 888 ms 728 KB Output is correct
6 Correct 8 ms 340 KB Output is correct
7 Correct 21 ms 344 KB Output is correct
8 Correct 138 ms 592 KB Output is correct
9 Correct 287 ms 724 KB Output is correct
10 Correct 846 ms 740 KB Output is correct
11 Correct 819 ms 852 KB Output is correct
12 Correct 864 ms 868 KB Output is correct
13 Correct 835 ms 836 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Correct 13 ms 344 KB Output is correct
16 Execution timed out 3034 ms 344 KB Time limit exceeded
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 27 ms 344 KB Output is correct
3 Partially correct 144 ms 600 KB Output is partially correct
4 Partially correct 446 ms 600 KB Output is partially correct
5 Partially correct 797 ms 1072 KB Output is partially correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 26 ms 344 KB Output is correct
8 Partially correct 156 ms 592 KB Output is partially correct
9 Partially correct 321 ms 500 KB Output is partially correct
10 Partially correct 856 ms 972 KB Output is partially correct
11 Partially correct 813 ms 1088 KB Output is partially correct
12 Partially correct 834 ms 736 KB Output is partially correct
13 Partially correct 778 ms 992 KB Output is partially correct
14 Correct 4 ms 344 KB Output is correct
15 Correct 15 ms 344 KB Output is correct
16 Execution timed out 3082 ms 600 KB Time limit exceeded
17 Halted 0 ms 0 KB -