oj.uz

Submission #636447

# Submission time Handle Problem Language Result Execution time Memory
636447 2022-08-29T09:45:21 Z borisAngelov Arranging Shoes (IOI19_shoes) C++14
100 / 100
 69 ms 12712 KB 
#include <bits/stdc++.h>
#include "shoes.h"

using namespace std;

const int MAXN = 200005;

int n;

vector<pair<int, int>> same_size[MAXN];
vector<pair<int, int>> matchings;

struct FenwickTree {
    int fenwick[MAXN];

    void update(int pos, int val) {
        while (pos < 2 * n) {
            fenwick[pos] += val;
            pos += (pos & (-pos));
        }
    }

    int query(int pos) {
        int result = 0;

        while (pos > 0) {
            result += fenwick[pos];
            pos -= (pos & (-pos));
        }

        return result;
    }
};
FenwickTree Fenwick;

long long count_swaps(std::vector<int> shoes) {
    n = int(shoes.size()) / 2;

    for (int i = 0; i < 2 * n; i++) {
        same_size[abs(shoes[i])].push_back({shoes[i], i});
    }

    long long ans = 0;

    for (int i = 1; i <= n; i++) {
        sort(same_size[i].begin(), same_size[i].end());

        for (int j = 0; j < int(same_size[i].size()) / 2; j++) {
            int l = same_size[i][j].second;
            int r = same_size[i][j + int(same_size[i].size()) / 2].second;

            if (l > r) {
                swap(l, r);
                ans++;
            }

            matchings.push_back({l + 1, r + 1});
        }
    }

    sort(matchings.begin(), matchings.end());

    for (int i = 1; i <= 2 * n; i++) Fenwick.update(i, 1);

    for (int i = 0; i < matchings.size(); i++) {
        int l = matchings[i].first;
        int r = matchings[i].second;

        if (r - l > 1) ans += Fenwick.query(r - 1) - Fenwick.query(l);

        Fenwick.update(l, -1);
        Fenwick.update(r, -1);
    }

    return ans;
}

Compilation message

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:65:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |     for (int i = 0; i < matchings.size(); i++) {
      |                     ~~^~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 5004 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 5004 KB Output is correct
3 Correct 3 ms 4980 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 4 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 5000 KB Output is correct
9 Correct 3 ms 5000 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5008 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 5000 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 4 ms 4948 KB Output is correct
20 Correct 4 ms 4948 KB Output is correct
21 Correct 3 ms 5076 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 5000 KB Output is correct
25 Correct 3 ms 5008 KB Output is correct
26 Correct 3 ms 5004 KB Output is correct
27 Correct 3 ms 5004 KB Output is correct
28 Correct 3 ms 4948 KB Output is correct
29 Correct 3 ms 4948 KB Output is correct
30 Correct 2 ms 4948 KB Output is correct
31 Correct 3 ms 4948 KB Output is correct
32 Correct 3 ms 4948 KB Output is correct
33 Correct 3 ms 5000 KB Output is correct
34 Correct 3 ms 4928 KB Output is correct
35 Correct 3 ms 4948 KB Output is correct
36 Correct 3 ms 4948 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 5004 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 5004 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 5000 KB Output is correct
8 Correct 4 ms 5004 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 4 ms 5000 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 4 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 3 ms 5000 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 7 ms 5712 KB Output is correct
21 Correct 9 ms 5652 KB Output is correct
22 Correct 55 ms 11964 KB Output is correct
23 Correct 44 ms 11972 KB Output is correct
24 Correct 51 ms 11904 KB Output is correct
25 Correct 37 ms 11708 KB Output is correct
26 Correct 59 ms 11904 KB Output is correct
27 Correct 40 ms 11756 KB Output is correct
28 Correct 38 ms 11896 KB Output is correct
29 Correct 39 ms 11996 KB Output is correct
30 Correct 37 ms 11908 KB Output is correct
31 Correct 51 ms 11980 KB Output is correct
32 Correct 40 ms 11904 KB Output is correct
33 Correct 36 ms 11848 KB Output is correct
34 Correct 38 ms 11904 KB Output is correct
35 Correct 3 ms 5000 KB Output is correct
36 Correct 3 ms 4948 KB Output is correct
37 Correct 39 ms 11988 KB Output is correct
38 Correct 39 ms 11964 KB Output is correct
39 Correct 38 ms 11964 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4936 KB Output is correct
3 Correct 3 ms 5004 KB Output is correct
4 Correct 3 ms 5000 KB Output is correct
5 Correct 59 ms 12628 KB Output is correct
6 Correct 51 ms 11968 KB Output is correct
7 Correct 57 ms 12532 KB Output is correct
8 Correct 45 ms 11996 KB Output is correct
9 Correct 54 ms 12544 KB Output is correct
10 Correct 69 ms 12408 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 5004 KB Output is correct
3 Correct 3 ms 4980 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 4 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 5000 KB Output is correct
9 Correct 3 ms 5000 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5008 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 5000 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 4 ms 4948 KB Output is correct
20 Correct 4 ms 4948 KB Output is correct
21 Correct 3 ms 5076 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 5000 KB Output is correct
25 Correct 3 ms 5008 KB Output is correct
26 Correct 3 ms 5004 KB Output is correct
27 Correct 3 ms 5004 KB Output is correct
28 Correct 3 ms 4948 KB Output is correct
29 Correct 3 ms 4948 KB Output is correct
30 Correct 2 ms 4948 KB Output is correct
31 Correct 3 ms 4948 KB Output is correct
32 Correct 3 ms 4948 KB Output is correct
33 Correct 3 ms 5000 KB Output is correct
34 Correct 3 ms 4928 KB Output is correct
35 Correct 3 ms 4948 KB Output is correct
36 Correct 3 ms 4948 KB Output is correct
37 Correct 3 ms 4948 KB Output is correct
38 Correct 3 ms 4948 KB Output is correct
39 Correct 3 ms 4948 KB Output is correct
40 Correct 3 ms 5008 KB Output is correct
41 Correct 3 ms 5076 KB Output is correct
42 Correct 3 ms 4948 KB Output is correct
43 Correct 3 ms 4948 KB Output is correct
44 Correct 3 ms 5012 KB Output is correct
45 Correct 3 ms 5076 KB Output is correct
46 Correct 3 ms 5076 KB Output is correct
47 Correct 4 ms 5076 KB Output is correct
48 Correct 4 ms 5076 KB Output is correct
49 Correct 4 ms 4948 KB Output is correct
50 Correct 3 ms 5012 KB Output is correct
51 Correct 3 ms 4948 KB Output is correct
52 Correct 3 ms 5076 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 5004 KB Output is correct
3 Correct 3 ms 4980 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 4 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 4 ms 5000 KB Output is correct
9 Correct 3 ms 5000 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5008 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 5000 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 4 ms 4948 KB Output is correct
20 Correct 4 ms 4948 KB Output is correct
21 Correct 3 ms 5076 KB Output is correct
22 Correct 3 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 5000 KB Output is correct
25 Correct 3 ms 5008 KB Output is correct
26 Correct 3 ms 5004 KB Output is correct
27 Correct 3 ms 5004 KB Output is correct
28 Correct 3 ms 4948 KB Output is correct
29 Correct 3 ms 4948 KB Output is correct
30 Correct 2 ms 4948 KB Output is correct
31 Correct 3 ms 4948 KB Output is correct
32 Correct 3 ms 4948 KB Output is correct
33 Correct 3 ms 5000 KB Output is correct
34 Correct 3 ms 4928 KB Output is correct
35 Correct 3 ms 4948 KB Output is correct
36 Correct 3 ms 4948 KB Output is correct
37 Correct 3 ms 4948 KB Output is correct
38 Correct 3 ms 5004 KB Output is correct
39 Correct 2 ms 4948 KB Output is correct
40 Correct 3 ms 4948 KB Output is correct
41 Correct 3 ms 5000 KB Output is correct
42 Correct 4 ms 5004 KB Output is correct
43 Correct 3 ms 4948 KB Output is correct
44 Correct 4 ms 5000 KB Output is correct
45 Correct 3 ms 4948 KB Output is correct
46 Correct 3 ms 4948 KB Output is correct
47 Correct 4 ms 4948 KB Output is correct
48 Correct 3 ms 4948 KB Output is correct
49 Correct 2 ms 4948 KB Output is correct
50 Correct 3 ms 5000 KB Output is correct
51 Correct 3 ms 4948 KB Output is correct
52 Correct 3 ms 4948 KB Output is correct
53 Correct 3 ms 4948 KB Output is correct
54 Correct 7 ms 5712 KB Output is correct
55 Correct 9 ms 5652 KB Output is correct
56 Correct 55 ms 11964 KB Output is correct
57 Correct 44 ms 11972 KB Output is correct
58 Correct 51 ms 11904 KB Output is correct
59 Correct 37 ms 11708 KB Output is correct
60 Correct 59 ms 11904 KB Output is correct
61 Correct 40 ms 11756 KB Output is correct
62 Correct 38 ms 11896 KB Output is correct
63 Correct 39 ms 11996 KB Output is correct
64 Correct 37 ms 11908 KB Output is correct
65 Correct 51 ms 11980 KB Output is correct
66 Correct 40 ms 11904 KB Output is correct
67 Correct 36 ms 11848 KB Output is correct
68 Correct 38 ms 11904 KB Output is correct
69 Correct 3 ms 5000 KB Output is correct
70 Correct 3 ms 4948 KB Output is correct
71 Correct 39 ms 11988 KB Output is correct
72 Correct 39 ms 11964 KB Output is correct
73 Correct 38 ms 11964 KB Output is correct
74 Correct 3 ms 4948 KB Output is correct
75 Correct 3 ms 4936 KB Output is correct
76 Correct 3 ms 5004 KB Output is correct
77 Correct 3 ms 5000 KB Output is correct
78 Correct 59 ms 12628 KB Output is correct
79 Correct 51 ms 11968 KB Output is correct
80 Correct 57 ms 12532 KB Output is correct
81 Correct 45 ms 11996 KB Output is correct
82 Correct 54 ms 12544 KB Output is correct
83 Correct 69 ms 12408 KB Output is correct
84 Correct 3 ms 4948 KB Output is correct
85 Correct 3 ms 4948 KB Output is correct
86 Correct 3 ms 4948 KB Output is correct
87 Correct 3 ms 5008 KB Output is correct
88 Correct 3 ms 5076 KB Output is correct
89 Correct 3 ms 4948 KB Output is correct
90 Correct 3 ms 4948 KB Output is correct
91 Correct 3 ms 5012 KB Output is correct
92 Correct 3 ms 5076 KB Output is correct
93 Correct 3 ms 5076 KB Output is correct
94 Correct 4 ms 5076 KB Output is correct
95 Correct 4 ms 5076 KB Output is correct
96 Correct 4 ms 4948 KB Output is correct
97 Correct 3 ms 5012 KB Output is correct
98 Correct 3 ms 4948 KB Output is correct
99 Correct 3 ms 5076 KB Output is correct
100 Correct 4 ms 5076 KB Output is correct
101 Correct 7 ms 5784 KB Output is correct
102 Correct 7 ms 5780 KB Output is correct
103 Correct 57 ms 12584 KB Output is correct
104 Correct 49 ms 12552 KB Output is correct
105 Correct 58 ms 12096 KB Output is correct
106 Correct 53 ms 12536 KB Output is correct
107 Correct 57 ms 11924 KB Output is correct
108 Correct 51 ms 11916 KB Output is correct
109 Correct 42 ms 11912 KB Output is correct
110 Correct 37 ms 11964 KB Output is correct
111 Correct 61 ms 12608 KB Output is correct
112 Correct 57 ms 12712 KB Output is correct
113 Correct 50 ms 12004 KB Output is correct
114 Correct 52 ms 12564 KB Output is correct
115 Correct 50 ms 12624 KB Output is correct