oj.uz

Submission #1060436

# Submission time Handle Problem Language Result Execution time Memory
1060436 2024-08-15T14:20:28 Z mychecksedad Longest Trip (IOI23_longesttrip) C++17
40 / 100
 17 ms 600 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);
  
  deque<int> a, b;
  a.pb(0);
  for(int i = 1; i < n; ++i){
    if(are_connected(vi{a[0]}, vi{i})){
      a.push_front(i);
    }else if(are_connected(vi{a.back()}, vi{i})){
      a.pb(i);
    }else{
      if(b.empty()) b.pb(i);
      else{
        if(are_connected(vi{b[0]}, vi{i})){
          b.push_front(i);
        }else if(are_connected(vi{b.back()}, vi{i})){
          b.pb(i);
        }else{
          if(are_connected(vi{a.back()}, vi{b[0]})){
            for(int x: b) a.pb(x);
            b.clear();
            b.pb(i);
          }else{
            assert(false);
          }
        }
      }
    }
  }
  if(b.size()>a.size())swap(a,b);
 
  vi A(all(a));
  vi B(all(b));
 
  if(B.empty()) return A;
 
  if(are_connected(A, B) == 0){
    return A;
  }
 
  int u = -1, v;
 
  while(a.size() < n){
    if(are_connected(vi{a[0]}, vi{a.back()}) == 0){
      if(are_connected(vi{a[0]}, vi{b.back()}) == 1){
        reverse(all(b));
        for(int x: b) a.push_front(x);
      }else{
        reverse(all(b));
        for(int x: b) a.pb(x);
      }
      break;
    }else{
      int ul = 0, ur = int(a.size()) - 1, ua = -1;
      while(ul <= ur){
        int um = ul+ur>>1;
        vi z;
        for(int j = 0; j <= um; ++j) z.pb(a[j]);
        if(are_connected(z, vi{b.back()})){
          ua = um;
          ur = um - 1;
        }else ul = um + 1;
      }
      if(ua == -1){
        vi res(all(a));
        return res;
      }
      u = a[ua];
      while(a.front() != u){
        int x = a.front();
        a.pop_front();
        a.pb(x);
      }
      reverse(all(b));
      for(int x: b) a.push_front(x);
      break;
    }
  }
  vi res(all(a));
  return res;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:89:18: warning: comparison of integer expressions of different signedness: 'std::deque<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   89 |   while(a.size() < n){
      |         ~~~~~~~~~^~~
longesttrip.cpp:102:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  102 |         int um = ul+ur>>1;
      |                  ~~^~~
longesttrip.cpp:87:15: warning: unused variable 'v' [-Wunused-variable]
   87 |   int u = -1, v;
      |               ^

Subtask #0
0.0 / 0.0

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

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 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 5 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 8 ms 344 KB Output is correct
4 Correct 7 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 5 ms 344 KB Output is correct
8 Correct 5 ms 344 KB Output is correct
9 Correct 6 ms 344 KB Output is correct
10 Correct 5 ms 344 KB Output is correct
11 Correct 7 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
25.0 / 25.0

# 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 5 ms 344 KB Output is correct
4 Correct 7 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 6 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 6 ms 344 KB Output is correct
12 Correct 5 ms 344 KB Output is correct
13 Correct 5 ms 344 KB Output is correct
14 Correct 8 ms 344 KB Output is correct
15 Correct 10 ms 344 KB Output is correct
16 Correct 9 ms 344 KB Output is correct
17 Correct 7 ms 344 KB Output is correct
18 Correct 7 ms 344 KB Output is correct
19 Correct 9 ms 344 KB Output is correct
20 Correct 7 ms 344 KB Output is correct
21 Correct 7 ms 444 KB Output is correct
22 Correct 6 ms 344 KB Output is correct
23 Correct 8 ms 344 KB Output is correct
24 Correct 6 ms 344 KB Output is correct
25 Correct 9 ms 344 KB Output is correct
26 Correct 10 ms 344 KB Output is correct
27 Correct 7 ms 344 KB Output is correct
28 Correct 5 ms 344 KB Output is correct
29 Correct 7 ms 344 KB Output is correct
30 Correct 5 ms 344 KB Output is correct
31 Correct 8 ms 344 KB Output is correct
32 Correct 10 ms 344 KB Output is correct
33 Correct 6 ms 344 KB Output is correct
34 Correct 5 ms 344 KB Output is correct
35 Correct 6 ms 344 KB Output is correct
36 Correct 4 ms 344 KB Output is correct
37 Correct 6 ms 344 KB Output is correct
38 Correct 7 ms 344 KB Output is correct
39 Correct 11 ms 344 KB Output is correct
40 Correct 7 ms 344 KB Output is correct
41 Correct 12 ms 600 KB Output is correct
42 Correct 7 ms 344 KB Output is correct
43 Correct 10 ms 344 KB Output is correct
44 Correct 9 ms 344 KB Output is correct
45 Correct 11 ms 344 KB Output is correct
46 Correct 9 ms 344 KB Output is correct
47 Correct 8 ms 344 KB Output is correct
48 Correct 8 ms 344 KB Output is correct
49 Correct 6 ms 344 KB Output is correct
50 Correct 8 ms 444 KB Output is correct
51 Correct 17 ms 344 KB Output is correct
52 Correct 9 ms 344 KB Output is correct
53 Correct 6 ms 344 KB Output is correct
54 Correct 6 ms 344 KB Output is correct
55 Correct 7 ms 344 KB Output is correct
56 Correct 5 ms 344 KB Output is correct
57 Correct 13 ms 348 KB Output is correct
58 Correct 11 ms 444 KB Output is correct
59 Correct 14 ms 344 KB Output is correct
60 Correct 12 ms 344 KB Output is correct
61 Correct 10 ms 344 KB Output is correct
62 Correct 14 ms 344 KB Output is correct
63 Correct 10 ms 344 KB Output is correct
64 Correct 10 ms 344 KB Output is correct

Subtask #4
0.0 / 60.0

# 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 5 ms 344 KB Output is correct
4 Correct 7 ms 344 KB Output is correct
5 Correct 5 ms 344 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 7 ms 344 KB Output is correct
8 Correct 7 ms 344 KB Output is correct
9 Correct 7 ms 344 KB Output is correct
10 Correct 6 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 5 ms 344 KB Output is correct
14 Correct 14 ms 344 KB Output is correct
15 Correct 11 ms 344 KB Output is correct
16 Correct 8 ms 344 KB Output is correct
17 Correct 8 ms 344 KB Output is correct
18 Correct 7 ms 344 KB Output is correct
19 Correct 6 ms 344 KB Output is correct
20 Correct 6 ms 440 KB Output is correct
21 Correct 12 ms 344 KB Output is correct
22 Correct 13 ms 344 KB Output is correct
23 Correct 5 ms 344 KB Output is correct
24 Correct 6 ms 344 KB Output is correct
25 Correct 7 ms 344 KB Output is correct
26 Correct 5 ms 344 KB Output is correct
27 Correct 8 ms 344 KB Output is correct
28 Correct 11 ms 344 KB Output is correct
29 Correct 6 ms 344 KB Output is correct
30 Correct 6 ms 344 KB Output is correct
31 Correct 5 ms 344 KB Output is correct
32 Correct 8 ms 344 KB Output is correct
33 Incorrect 0 ms 344 KB Incorrect
34 Halted 0 ms 0 KB -