oj.uz

Submission #361866

# Submission time Handle Problem Language Result Execution time Memory
361866 2021-01-31T18:57:27 Z Matteo_Verz Arranging Shoes (IOI19_shoes) C++17
100 / 100
 120 ms 9692 KB 
#include "shoes.h"
#include <bits/stdc++.h>

using namespace std;
const int N = 1e5;

class Fenwick {
  private:
    vector <int> a;

    int lsb(int i) {
      return (i & (-i));
    }

  public:
    Fenwick(int n) {
      a.resize(1 + n);
    }

    void Update(int pos, int val) {
      for(; pos < a.size(); pos += lsb(pos))
        a[pos] += val;
    }

    int Query(int pos) {
      int ans(0);
      for(; pos > 0; pos -= lsb(pos))
        ans += a[pos];

      return ans;
    }
};

int rightpos[1 + 2 * N];
long long count_swaps(vector<int> s) {
  set <pair <int, int>> myset;
  s.insert(s.begin(), 0);
  int n = s.size() - 1;
  Fenwick aib(n);

  for(int i = 1; i <= n; i++) {
    set <pair <int, int>> :: iterator it = myset.lower_bound(make_pair(-s[i], 0));

    if(it != myset.end() && (*it).first == -s[i]) {
      rightpos[(*it).second] = i;
      rightpos[i] = i;
      myset.erase(it);
    } else myset.insert(make_pair(s[i], i));
    aib.Update(i, 1);
  }

  long long ans(0);
  for(int i = 1; i <= n; i++) {
    int pereche = rightpos[i];
    if(pereche != i) {
      aib.Update(i, -1); aib.Update(pereche, -1);

      if(s[i] < 0) ans += 1LL * aib.Query(pereche);
      else ans += 1LL * (aib.Query(pereche) + 1);
    }
  }

  return ans;
}

Compilation message

shoes.cpp: In member function 'void Fenwick::Update(int, int)':
shoes.cpp:21:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |       for(; pos < a.size(); pos += lsb(pos))
      |             ~~~~^~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 0 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 0 ms 364 KB Output is correct
15 Correct 0 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 0 ms 364 KB Output is correct
18 Correct 0 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 0 ms 364 KB Output is correct
21 Correct 0 ms 364 KB Output is correct
22 Correct 0 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 0 ms 364 KB Output is correct
25 Correct 0 ms 364 KB Output is correct
26 Correct 1 ms 512 KB Output is correct
27 Correct 0 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 0 ms 364 KB Output is correct
33 Correct 0 ms 364 KB Output is correct
34 Correct 0 ms 364 KB Output is correct
35 Correct 0 ms 364 KB Output is correct
36 Correct 1 ms 364 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 0 ms 364 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 0 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 5 ms 620 KB Output is correct
21 Correct 5 ms 620 KB Output is correct
22 Correct 49 ms 3420 KB Output is correct
23 Correct 41 ms 4828 KB Output is correct
24 Correct 50 ms 4828 KB Output is correct
25 Correct 68 ms 9180 KB Output is correct
26 Correct 64 ms 4700 KB Output is correct
27 Correct 41 ms 4572 KB Output is correct
28 Correct 67 ms 9436 KB Output is correct
29 Correct 67 ms 9436 KB Output is correct
30 Correct 69 ms 9436 KB Output is correct
31 Correct 50 ms 4700 KB Output is correct
32 Correct 71 ms 9436 KB Output is correct
33 Correct 66 ms 9180 KB Output is correct
34 Correct 67 ms 9456 KB Output is correct
35 Correct 1 ms 376 KB Output is correct
36 Correct 1 ms 364 KB Output is correct
37 Correct 71 ms 9436 KB Output is correct
38 Correct 71 ms 9436 KB Output is correct
39 Correct 71 ms 9692 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 99 ms 8156 KB Output is correct
6 Correct 101 ms 9436 KB Output is correct
7 Correct 103 ms 9420 KB Output is correct
8 Correct 63 ms 9436 KB Output is correct
9 Correct 97 ms 9408 KB Output is correct
10 Correct 102 ms 9436 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 0 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 0 ms 364 KB Output is correct
15 Correct 0 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 0 ms 364 KB Output is correct
18 Correct 0 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 0 ms 364 KB Output is correct
21 Correct 0 ms 364 KB Output is correct
22 Correct 0 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 0 ms 364 KB Output is correct
25 Correct 0 ms 364 KB Output is correct
26 Correct 1 ms 512 KB Output is correct
27 Correct 0 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 0 ms 364 KB Output is correct
33 Correct 0 ms 364 KB Output is correct
34 Correct 0 ms 364 KB Output is correct
35 Correct 0 ms 364 KB Output is correct
36 Correct 1 ms 364 KB Output is correct
37 Correct 0 ms 364 KB Output is correct
38 Correct 1 ms 364 KB Output is correct
39 Correct 1 ms 364 KB Output is correct
40 Correct 1 ms 364 KB Output is correct
41 Correct 1 ms 364 KB Output is correct
42 Correct 1 ms 364 KB Output is correct
43 Correct 1 ms 364 KB Output is correct
44 Correct 1 ms 364 KB Output is correct
45 Correct 1 ms 364 KB Output is correct
46 Correct 1 ms 364 KB Output is correct
47 Correct 1 ms 364 KB Output is correct
48 Correct 1 ms 364 KB Output is correct
49 Correct 1 ms 364 KB Output is correct
50 Correct 1 ms 364 KB Output is correct
51 Correct 1 ms 364 KB Output is correct
52 Correct 1 ms 364 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 0 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 0 ms 364 KB Output is correct
15 Correct 0 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 0 ms 364 KB Output is correct
18 Correct 0 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 0 ms 364 KB Output is correct
21 Correct 0 ms 364 KB Output is correct
22 Correct 0 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 0 ms 364 KB Output is correct
25 Correct 0 ms 364 KB Output is correct
26 Correct 1 ms 512 KB Output is correct
27 Correct 0 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 0 ms 364 KB Output is correct
33 Correct 0 ms 364 KB Output is correct
34 Correct 0 ms 364 KB Output is correct
35 Correct 0 ms 364 KB Output is correct
36 Correct 1 ms 364 KB Output is correct
37 Correct 0 ms 364 KB Output is correct
38 Correct 1 ms 364 KB Output is correct
39 Correct 0 ms 364 KB Output is correct
40 Correct 0 ms 364 KB Output is correct
41 Correct 1 ms 384 KB Output is correct
42 Correct 1 ms 364 KB Output is correct
43 Correct 1 ms 364 KB Output is correct
44 Correct 0 ms 364 KB Output is correct
45 Correct 0 ms 364 KB Output is correct
46 Correct 0 ms 364 KB Output is correct
47 Correct 0 ms 364 KB Output is correct
48 Correct 1 ms 364 KB Output is correct
49 Correct 0 ms 364 KB Output is correct
50 Correct 0 ms 364 KB Output is correct
51 Correct 1 ms 364 KB Output is correct
52 Correct 1 ms 364 KB Output is correct
53 Correct 1 ms 364 KB Output is correct
54 Correct 5 ms 620 KB Output is correct
55 Correct 5 ms 620 KB Output is correct
56 Correct 49 ms 3420 KB Output is correct
57 Correct 41 ms 4828 KB Output is correct
58 Correct 50 ms 4828 KB Output is correct
59 Correct 68 ms 9180 KB Output is correct
60 Correct 64 ms 4700 KB Output is correct
61 Correct 41 ms 4572 KB Output is correct
62 Correct 67 ms 9436 KB Output is correct
63 Correct 67 ms 9436 KB Output is correct
64 Correct 69 ms 9436 KB Output is correct
65 Correct 50 ms 4700 KB Output is correct
66 Correct 71 ms 9436 KB Output is correct
67 Correct 66 ms 9180 KB Output is correct
68 Correct 67 ms 9456 KB Output is correct
69 Correct 1 ms 376 KB Output is correct
70 Correct 1 ms 364 KB Output is correct
71 Correct 71 ms 9436 KB Output is correct
72 Correct 71 ms 9436 KB Output is correct
73 Correct 71 ms 9692 KB Output is correct
74 Correct 0 ms 364 KB Output is correct
75 Correct 1 ms 364 KB Output is correct
76 Correct 1 ms 364 KB Output is correct
77 Correct 1 ms 364 KB Output is correct
78 Correct 99 ms 8156 KB Output is correct
79 Correct 101 ms 9436 KB Output is correct
80 Correct 103 ms 9420 KB Output is correct
81 Correct 63 ms 9436 KB Output is correct
82 Correct 97 ms 9408 KB Output is correct
83 Correct 102 ms 9436 KB Output is correct
84 Correct 0 ms 364 KB Output is correct
85 Correct 1 ms 364 KB Output is correct
86 Correct 1 ms 364 KB Output is correct
87 Correct 1 ms 364 KB Output is correct
88 Correct 1 ms 364 KB Output is correct
89 Correct 1 ms 364 KB Output is correct
90 Correct 1 ms 364 KB Output is correct
91 Correct 1 ms 364 KB Output is correct
92 Correct 1 ms 364 KB Output is correct
93 Correct 1 ms 364 KB Output is correct
94 Correct 1 ms 364 KB Output is correct
95 Correct 1 ms 364 KB Output is correct
96 Correct 1 ms 364 KB Output is correct
97 Correct 1 ms 364 KB Output is correct
98 Correct 1 ms 364 KB Output is correct
99 Correct 1 ms 364 KB Output is correct
100 Correct 1 ms 364 KB Output is correct
101 Correct 9 ms 1004 KB Output is correct
102 Correct 8 ms 876 KB Output is correct
103 Correct 119 ms 7004 KB Output is correct
104 Correct 39 ms 4700 KB Output is correct
105 Correct 65 ms 4700 KB Output is correct
106 Correct 97 ms 9436 KB Output is correct
107 Correct 58 ms 4700 KB Output is correct
108 Correct 40 ms 4700 KB Output is correct
109 Correct 62 ms 9436 KB Output is correct
110 Correct 68 ms 9436 KB Output is correct
111 Correct 102 ms 9436 KB Output is correct
112 Correct 120 ms 8412 KB Output is correct
113 Correct 115 ms 9436 KB Output is correct
114 Correct 96 ms 9436 KB Output is correct
115 Correct 94 ms 9436 KB Output is correct