oj.uz

답안 #146604

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
146604 2019-08-24T17:32:41 Z AlexPop28 Arranging Shoes (IOI19_shoes) C++14
100 / 100
 118 ms 20412 KB 
#include <bits/stdc++.h>
#include "shoes.h"

using namespace std;

struct Fenwick {
  int n;
  vector<int> tree;
  Fenwick(int n_) : n(n_), tree(n + 1) {}
  inline int lsb(int x) {
    return x & -x;
  }
  void Update(int pos, int val) {
    for (++pos; pos <= n; pos += lsb(pos))
      tree[pos] += val;
  }
  int Query(int pos) {
    int ret = 0;
    for (++pos; pos >= 1; pos -= lsb(pos))
      ret += tree[pos];
    return ret;
  }
};

long long count_swaps(vector<int> s) {
  int n = s.size();
  vector<vector<int>> left(n + 1), right(n + 1);
  for (int i = 0; i < n; ++i) {
    if (s[i] < 0) left[-s[i]].emplace_back(i);
    else right[s[i]].emplace_back(i);
  }
  vector<pair<int, int>> pairs; pairs.reserve(n);
  for (int size = 1; size <= n / 2; ++size) {
    assert(left[size].size() == right[size].size());
    for (int j = 0; j < (int)left[size].size(); ++j) {
      pairs.emplace_back(left[size][j], right[size][j]);
    }
  }
  sort(pairs.begin(), pairs.end(), [](const pair<int, int> &a, const pair<int, int> &b){
    return a.first + a.second < b.first + b.second;
  });
  Fenwick tree(n);
  long long idx = 0, ans = 0LL;
  for (auto &p : pairs) {
    int l, r; tie(l, r) = p;
    l += tree.Query(l);
    r += tree.Query(r);
    //~ cerr << l << ' ' << r << endl;
    ans += l - idx + r - idx - 1;
    if (l > r) ++ans;
    tree.Update(0, 2);
    tree.Update(p.first, -1);
    tree.Update(p.second, -1);
    idx += 2;
  }
  return ans;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 256 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 356 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 256 KB Output is correct
27 Correct 2 ms 256 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 256 KB Output is correct
31 Correct 2 ms 376 KB Output is correct
32 Correct 3 ms 376 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 2 ms 256 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 256 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 380 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 3 ms 376 KB Output is correct
9 Correct 2 ms 360 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 312 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 256 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 504 KB Output is correct
19 Correct 3 ms 504 KB Output is correct
20 Correct 7 ms 1912 KB Output is correct
21 Correct 7 ms 1784 KB Output is correct
22 Correct 58 ms 15128 KB Output is correct
23 Correct 54 ms 15084 KB Output is correct
24 Correct 58 ms 15084 KB Output is correct
25 Correct 56 ms 14832 KB Output is correct
26 Correct 57 ms 15084 KB Output is correct
27 Correct 53 ms 14956 KB Output is correct
28 Correct 57 ms 15088 KB Output is correct
29 Correct 56 ms 15088 KB Output is correct
30 Correct 56 ms 15016 KB Output is correct
31 Correct 58 ms 14976 KB Output is correct
32 Correct 56 ms 15088 KB Output is correct
33 Correct 55 ms 14832 KB Output is correct
34 Correct 57 ms 15088 KB Output is correct
35 Correct 2 ms 256 KB Output is correct
36 Correct 2 ms 376 KB Output is correct
37 Correct 58 ms 15016 KB Output is correct
38 Correct 56 ms 15088 KB Output is correct
39 Correct 55 ms 15088 KB Output is correct

Subtask #4
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 107 ms 20412 KB Output is correct
6 Correct 79 ms 15628 KB Output is correct
7 Correct 107 ms 20344 KB Output is correct
8 Correct 68 ms 15108 KB Output is correct
9 Correct 106 ms 20344 KB Output is correct
10 Correct 97 ms 17272 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 256 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 356 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 256 KB Output is correct
27 Correct 2 ms 256 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 256 KB Output is correct
31 Correct 2 ms 376 KB Output is correct
32 Correct 3 ms 376 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 2 ms 256 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 256 KB Output is correct
37 Correct 2 ms 252 KB Output is correct
38 Correct 2 ms 376 KB Output is correct
39 Correct 2 ms 376 KB Output is correct
40 Correct 2 ms 376 KB Output is correct
41 Correct 3 ms 504 KB Output is correct
42 Correct 3 ms 504 KB Output is correct
43 Correct 3 ms 632 KB Output is correct
44 Correct 3 ms 504 KB Output is correct
45 Correct 3 ms 504 KB Output is correct
46 Correct 3 ms 636 KB Output is correct
47 Correct 3 ms 504 KB Output is correct
48 Correct 3 ms 504 KB Output is correct
49 Correct 3 ms 504 KB Output is correct
50 Correct 3 ms 500 KB Output is correct
51 Correct 2 ms 500 KB Output is correct
52 Correct 3 ms 504 KB Output is correct

Subtask #6
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 256 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 356 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 256 KB Output is correct
27 Correct 2 ms 256 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 256 KB Output is correct
31 Correct 2 ms 376 KB Output is correct
32 Correct 3 ms 376 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 2 ms 256 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 256 KB Output is correct
37 Correct 2 ms 376 KB Output is correct
38 Correct 2 ms 376 KB Output is correct
39 Correct 2 ms 380 KB Output is correct
40 Correct 2 ms 256 KB Output is correct
41 Correct 2 ms 256 KB Output is correct
42 Correct 3 ms 376 KB Output is correct
43 Correct 2 ms 360 KB Output is correct
44 Correct 2 ms 256 KB Output is correct
45 Correct 2 ms 256 KB Output is correct
46 Correct 2 ms 256 KB Output is correct
47 Correct 2 ms 312 KB Output is correct
48 Correct 2 ms 256 KB Output is correct
49 Correct 2 ms 256 KB Output is correct
50 Correct 2 ms 376 KB Output is correct
51 Correct 2 ms 376 KB Output is correct
52 Correct 2 ms 504 KB Output is correct
53 Correct 3 ms 504 KB Output is correct
54 Correct 7 ms 1912 KB Output is correct
55 Correct 7 ms 1784 KB Output is correct
56 Correct 58 ms 15128 KB Output is correct
57 Correct 54 ms 15084 KB Output is correct
58 Correct 58 ms 15084 KB Output is correct
59 Correct 56 ms 14832 KB Output is correct
60 Correct 57 ms 15084 KB Output is correct
61 Correct 53 ms 14956 KB Output is correct
62 Correct 57 ms 15088 KB Output is correct
63 Correct 56 ms 15088 KB Output is correct
64 Correct 56 ms 15016 KB Output is correct
65 Correct 58 ms 14976 KB Output is correct
66 Correct 56 ms 15088 KB Output is correct
67 Correct 55 ms 14832 KB Output is correct
68 Correct 57 ms 15088 KB Output is correct
69 Correct 2 ms 256 KB Output is correct
70 Correct 2 ms 376 KB Output is correct
71 Correct 58 ms 15016 KB Output is correct
72 Correct 56 ms 15088 KB Output is correct
73 Correct 55 ms 15088 KB Output is correct
74 Correct 2 ms 256 KB Output is correct
75 Correct 2 ms 256 KB Output is correct
76 Correct 2 ms 376 KB Output is correct
77 Correct 2 ms 376 KB Output is correct
78 Correct 107 ms 20412 KB Output is correct
79 Correct 79 ms 15628 KB Output is correct
80 Correct 107 ms 20344 KB Output is correct
81 Correct 68 ms 15108 KB Output is correct
82 Correct 106 ms 20344 KB Output is correct
83 Correct 97 ms 17272 KB Output is correct
84 Correct 2 ms 252 KB Output is correct
85 Correct 2 ms 376 KB Output is correct
86 Correct 2 ms 376 KB Output is correct
87 Correct 2 ms 376 KB Output is correct
88 Correct 3 ms 504 KB Output is correct
89 Correct 3 ms 504 KB Output is correct
90 Correct 3 ms 632 KB Output is correct
91 Correct 3 ms 504 KB Output is correct
92 Correct 3 ms 504 KB Output is correct
93 Correct 3 ms 636 KB Output is correct
94 Correct 3 ms 504 KB Output is correct
95 Correct 3 ms 504 KB Output is correct
96 Correct 3 ms 504 KB Output is correct
97 Correct 3 ms 500 KB Output is correct
98 Correct 2 ms 500 KB Output is correct
99 Correct 3 ms 504 KB Output is correct
100 Correct 3 ms 504 KB Output is correct
101 Correct 11 ms 2296 KB Output is correct
102 Correct 9 ms 1912 KB Output is correct
103 Correct 118 ms 20344 KB Output is correct
104 Correct 106 ms 20344 KB Output is correct
105 Correct 102 ms 17628 KB Output is correct
106 Correct 104 ms 20348 KB Output is correct
107 Correct 82 ms 15728 KB Output is correct
108 Correct 86 ms 16120 KB Output is correct
109 Correct 65 ms 15316 KB Output is correct
110 Correct 60 ms 15080 KB Output is correct
111 Correct 104 ms 19704 KB Output is correct
112 Correct 106 ms 19036 KB Output is correct
113 Correct 86 ms 15736 KB Output is correct
114 Correct 99 ms 20344 KB Output is correct
115 Correct 101 ms 20344 KB Output is correct