oj.uz

Submission #702044

# Submission time Handle Problem Language Result Execution time Memory
702044 2023-02-22T14:01:06 Z bebra Arranging Shoes (IOI19_shoes) C++17
100 / 100
 78 ms 16528 KB 
#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#define dbg(x) cerr << #x << ": " << x << endl;


struct FenwickTree {
    vector<int> tree;
    int size;

    FenwickTree(int n) {
        size = n;
        tree.resize(size);
    }

    void update(int pos, int value) {
        for (int i = pos; i < size; i |= i + 1) {
            tree[i] += value;
        }
    }

    int query(int l, int r) {
        int res = 0;
        for (int i = r; i >= 0; i = (i & (i + 1)) - 1) {
            res += tree[i];
        }
        for (int i = l - 1; i >= 0; i = (i & (i + 1)) - 1) {
            res -= tree[i];
        }
        return res;
    }
};


ll count_swaps(vector<int> a) {
    int n = a.size() / 2;
    vector<vector<int>> left_elms(n + 1), right_elms(n + 1);
    for (int i = 0; i < n * 2; ++i) {
        int x = a[i];
        if (x < 0) {
            left_elms[-x].push_back(i);
        } else {
            right_elms[x].push_back(i);
        }
    }
    vector<pair<int, int>> pairs;
    ll res = 0;
    for (int x = 1; x <= n; ++x) {
        for (int i = 0; i < (int)left_elms[x].size(); ++i) {
            int l = left_elms[x][i];
            int r = right_elms[x][i];
            if (l > r) {
                swap(l, r);
                ++res;
            }
            pairs.emplace_back(l, r);
        }
    }
    sort(pairs.begin(), pairs.end());
    vector<int> p(n * 2);
    for (int i = 0; i < n; ++i) {
        auto [l, r] = pairs[i];
        p[l] = 2 * i;
        p[r] = 2 * i + 1;
    }
    FenwickTree tree(n * 2);
    for (auto x : p) {
        res += tree.query(x + 1, n * 2 - 1);
        tree.update(x, 1);
    }
    return res;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 296 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 296 KB Output is correct
3 Correct 1 ms 216 KB Output is correct
4 Correct 0 ms 296 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 304 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 300 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 304 KB Output is correct
25 Correct 1 ms 304 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 296 KB Output is correct
30 Correct 1 ms 300 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 1 ms 296 KB Output is correct
36 Correct 0 ms 212 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 296 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 300 KB Output is correct
6 Correct 1 ms 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 296 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 292 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 296 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 304 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 5 ms 1364 KB Output is correct
21 Correct 4 ms 1364 KB Output is correct
22 Correct 34 ms 10564 KB Output is correct
23 Correct 33 ms 10428 KB Output is correct
24 Correct 34 ms 10400 KB Output is correct
25 Correct 30 ms 10432 KB Output is correct
26 Correct 38 ms 10440 KB Output is correct
27 Correct 34 ms 10396 KB Output is correct
28 Correct 32 ms 10540 KB Output is correct
29 Correct 31 ms 10424 KB Output is correct
30 Correct 33 ms 10400 KB Output is correct
31 Correct 34 ms 10336 KB Output is correct
32 Correct 31 ms 10380 KB Output is correct
33 Correct 30 ms 10440 KB Output is correct
34 Correct 31 ms 10432 KB Output is correct
35 Correct 0 ms 300 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 31 ms 10388 KB Output is correct
38 Correct 31 ms 10304 KB Output is correct
39 Correct 31 ms 10288 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 300 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 300 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 58 ms 15908 KB Output is correct
6 Correct 53 ms 11072 KB Output is correct
7 Correct 63 ms 16016 KB Output is correct
8 Correct 33 ms 10476 KB Output is correct
9 Correct 61 ms 15908 KB Output is correct
10 Correct 54 ms 12756 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 296 KB Output is correct
3 Correct 1 ms 216 KB Output is correct
4 Correct 0 ms 296 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 304 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 300 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 304 KB Output is correct
25 Correct 1 ms 304 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 296 KB Output is correct
30 Correct 1 ms 300 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 1 ms 296 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 1 ms 300 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 440 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 308 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 1 ms 340 KB Output is correct
50 Correct 1 ms 312 KB Output is correct
51 Correct 1 ms 312 KB Output is correct
52 Correct 1 ms 340 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 296 KB Output is correct
3 Correct 1 ms 216 KB Output is correct
4 Correct 0 ms 296 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 304 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 300 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 304 KB Output is correct
25 Correct 1 ms 304 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 296 KB Output is correct
30 Correct 1 ms 300 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 1 ms 296 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 0 ms 300 KB Output is correct
40 Correct 1 ms 304 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 1 ms 296 KB Output is correct
44 Correct 1 ms 212 KB Output is correct
45 Correct 1 ms 292 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 1 ms 296 KB Output is correct
49 Correct 0 ms 212 KB Output is correct
50 Correct 1 ms 304 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 304 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 5 ms 1364 KB Output is correct
55 Correct 4 ms 1364 KB Output is correct
56 Correct 34 ms 10564 KB Output is correct
57 Correct 33 ms 10428 KB Output is correct
58 Correct 34 ms 10400 KB Output is correct
59 Correct 30 ms 10432 KB Output is correct
60 Correct 38 ms 10440 KB Output is correct
61 Correct 34 ms 10396 KB Output is correct
62 Correct 32 ms 10540 KB Output is correct
63 Correct 31 ms 10424 KB Output is correct
64 Correct 33 ms 10400 KB Output is correct
65 Correct 34 ms 10336 KB Output is correct
66 Correct 31 ms 10380 KB Output is correct
67 Correct 30 ms 10440 KB Output is correct
68 Correct 31 ms 10432 KB Output is correct
69 Correct 0 ms 300 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 31 ms 10388 KB Output is correct
72 Correct 31 ms 10304 KB Output is correct
73 Correct 31 ms 10288 KB Output is correct
74 Correct 0 ms 300 KB Output is correct
75 Correct 1 ms 212 KB Output is correct
76 Correct 0 ms 300 KB Output is correct
77 Correct 1 ms 212 KB Output is correct
78 Correct 58 ms 15908 KB Output is correct
79 Correct 53 ms 11072 KB Output is correct
80 Correct 63 ms 16016 KB Output is correct
81 Correct 33 ms 10476 KB Output is correct
82 Correct 61 ms 15908 KB Output is correct
83 Correct 54 ms 12756 KB Output is correct
84 Correct 1 ms 300 KB Output is correct
85 Correct 1 ms 212 KB Output is correct
86 Correct 1 ms 212 KB Output is correct
87 Correct 1 ms 212 KB Output is correct
88 Correct 1 ms 340 KB Output is correct
89 Correct 1 ms 340 KB Output is correct
90 Correct 1 ms 340 KB Output is correct
91 Correct 1 ms 440 KB Output is correct
92 Correct 1 ms 340 KB Output is correct
93 Correct 1 ms 308 KB Output is correct
94 Correct 1 ms 340 KB Output is correct
95 Correct 1 ms 340 KB Output is correct
96 Correct 1 ms 340 KB Output is correct
97 Correct 1 ms 312 KB Output is correct
98 Correct 1 ms 312 KB Output is correct
99 Correct 1 ms 340 KB Output is correct
100 Correct 1 ms 340 KB Output is correct
101 Correct 6 ms 1748 KB Output is correct
102 Correct 7 ms 1464 KB Output is correct
103 Correct 68 ms 16528 KB Output is correct
104 Correct 78 ms 16516 KB Output is correct
105 Correct 64 ms 13864 KB Output is correct
106 Correct 59 ms 16528 KB Output is correct
107 Correct 49 ms 11844 KB Output is correct
108 Correct 52 ms 12252 KB Output is correct
109 Correct 36 ms 11456 KB Output is correct
110 Correct 36 ms 11072 KB Output is correct
111 Correct 58 ms 15780 KB Output is correct
112 Correct 66 ms 15048 KB Output is correct
113 Correct 46 ms 11876 KB Output is correct
114 Correct 61 ms 16528 KB Output is correct
115 Correct 62 ms 16472 KB Output is correct