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Submission #591090

# Submission time Handle Problem Language Result Execution time Memory
591090 2022-07-06T20:37:38 Z dryeab Arranging Shoes (IOI19_shoes) C++17
100 / 100
 81 ms 14872 KB 
#include <bits/stdc++.h>

using namespace std;

struct segment_tree {

    int n;
    vector<int> tree;

    void init(int i) {
        n = 1;
        while (n < i)
            n *= 2;
        tree.resize(2 * n, 0);
    }

    void set(int i) {
        i += n;
        tree[i] = 1;
        for (i /= 2; i > 0; i /= 2)
            tree[i] = tree[2 * i] + tree[2 * i + 1];
    }

    int get(int l, int r) {
        l += n;
        r += n;
        int res = 0;
        while (l <= r) {
            if (l & 1)
                res += tree[l++];
            if (!(r & 1))
                res += tree[r--];
            r /= 2, l /= 2;
        }
        return res;
    }
};

long long count_swaps(vector<int> s) {

    int n = s.size(), shift = 0;

    vector<vector<int>> left(n / 2 + 1), right(n / 2 + 1);
    for (int i = n - 1; i >= 0; --i) {
        if (s[i] < 0)
            left[-s[i]].push_back(i);
        else
            right[s[i]].push_back(i);
    }

    long long res = 0;

    segment_tree st;
    st.init(n);

    for (int i = 0, j; i < n; ++i) {

        if (s[i] == 0) {
            // shift--;
            continue;

        } else if (s[i] > 0) {

            j = left[s[i]][left[s[i]].size() - 1];
            left[s[i]].pop_back();
            right[s[i]].pop_back();

            shift = st.get(i + 1, j - 1);
            res += j - i - shift;
            s[j] = s[i] = 0;

            st.set(i), st.set(j);
        } else {

            j = right[-s[i]][right[-s[i]].size() - 1];
            right[-s[i]].pop_back();
            left[-s[i]].pop_back();

            shift = st.get(i + 1, j - 1);

            res += j - i - shift - 1;

            s[j] = s[i] = 0;
            st.set(i), st.set(j);
        }

        // shift++;
    }

    return res;
}

// int main() {

//     ios::sync_with_stdio(false);
//     cin.tie(0);

//     int n;
//     cin >> n;

//     vector<int> s(n);
//     for (int &i : s)
//         cin >> i;

//     cout << "ans " << count_swaps(s) << endl;
// }

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 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 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 0 ms 212 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 0 ms 212 KB Output is correct
2 Correct 0 ms 212 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 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 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 1 ms 340 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 38 ms 9420 KB Output is correct
23 Correct 35 ms 9544 KB Output is correct
24 Correct 37 ms 9444 KB Output is correct
25 Correct 36 ms 9532 KB Output is correct
26 Correct 37 ms 9528 KB Output is correct
27 Correct 33 ms 9544 KB Output is correct
28 Correct 35 ms 9528 KB Output is correct
29 Correct 38 ms 9516 KB Output is correct
30 Correct 35 ms 9548 KB Output is correct
31 Correct 39 ms 9428 KB Output is correct
32 Correct 34 ms 9420 KB Output is correct
33 Correct 49 ms 9512 KB Output is correct
34 Correct 36 ms 9524 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 35 ms 9520 KB Output is correct
38 Correct 36 ms 9548 KB Output is correct
39 Correct 35 ms 9532 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 59 ms 14804 KB Output is correct
6 Correct 44 ms 10056 KB Output is correct
7 Correct 72 ms 14796 KB Output is correct
8 Correct 39 ms 9596 KB Output is correct
9 Correct 58 ms 14784 KB Output is correct
10 Correct 58 ms 11712 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 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 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 0 ms 212 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 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 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 2 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 340 KB Output is correct
51 Correct 1 ms 340 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 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 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 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 0 ms 212 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 212 KB Output is correct
40 Correct 0 ms 212 KB Output is correct
41 Correct 0 ms 212 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 1 ms 212 KB Output is correct
44 Correct 0 ms 212 KB Output is correct
45 Correct 0 ms 212 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 0 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 0 ms 212 KB Output is correct
52 Correct 1 ms 340 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 38 ms 9420 KB Output is correct
57 Correct 35 ms 9544 KB Output is correct
58 Correct 37 ms 9444 KB Output is correct
59 Correct 36 ms 9532 KB Output is correct
60 Correct 37 ms 9528 KB Output is correct
61 Correct 33 ms 9544 KB Output is correct
62 Correct 35 ms 9528 KB Output is correct
63 Correct 38 ms 9516 KB Output is correct
64 Correct 35 ms 9548 KB Output is correct
65 Correct 39 ms 9428 KB Output is correct
66 Correct 34 ms 9420 KB Output is correct
67 Correct 49 ms 9512 KB Output is correct
68 Correct 36 ms 9524 KB Output is correct
69 Correct 0 ms 212 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 35 ms 9520 KB Output is correct
72 Correct 36 ms 9548 KB Output is correct
73 Correct 35 ms 9532 KB Output is correct
74 Correct 0 ms 212 KB Output is correct
75 Correct 0 ms 212 KB Output is correct
76 Correct 0 ms 212 KB Output is correct
77 Correct 0 ms 212 KB Output is correct
78 Correct 59 ms 14804 KB Output is correct
79 Correct 44 ms 10056 KB Output is correct
80 Correct 72 ms 14796 KB Output is correct
81 Correct 39 ms 9596 KB Output is correct
82 Correct 58 ms 14784 KB Output is correct
83 Correct 58 ms 11712 KB Output is correct
84 Correct 0 ms 212 KB Output is correct
85 Correct 0 ms 212 KB Output is correct
86 Correct 0 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 340 KB Output is correct
92 Correct 1 ms 340 KB Output is correct
93 Correct 1 ms 340 KB Output is correct
94 Correct 2 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 340 KB Output is correct
98 Correct 1 ms 340 KB Output is correct
99 Correct 1 ms 340 KB Output is correct
100 Correct 1 ms 340 KB Output is correct
101 Correct 7 ms 1748 KB Output is correct
102 Correct 7 ms 1400 KB Output is correct
103 Correct 81 ms 14780 KB Output is correct
104 Correct 61 ms 14796 KB Output is correct
105 Correct 76 ms 12108 KB Output is correct
106 Correct 64 ms 14784 KB Output is correct
107 Correct 53 ms 10208 KB Output is correct
108 Correct 49 ms 10496 KB Output is correct
109 Correct 41 ms 9804 KB Output is correct
110 Correct 34 ms 9548 KB Output is correct
111 Correct 57 ms 14136 KB Output is correct
112 Correct 78 ms 13404 KB Output is correct
113 Correct 54 ms 10060 KB Output is correct
114 Correct 61 ms 14776 KB Output is correct
115 Correct 71 ms 14872 KB Output is correct