oj.uz

Submission #921574

# Submission time Handle Problem Language Result Execution time Memory
921574 2024-02-04T06:54:36 Z GrandTiger1729 Monochrome Points (JOI20_monochrome) C++17
35 / 100
 2000 ms 6616 KB 
#include <bits/stdc++.h>
using namespace std;

struct BIT
{
    int n;
    vector<int> bit;
    BIT(int n_) : n(n_), bit(n + 1) {}
    void add(int i, int u)
    {
        for (; i <= n; i += i & -i)
        {
            bit[i] += u;
        }
    }
    int query(int i)
    {
        int ret = 0;
        for (; i > 0; i -= i & -i)
        {
            ret += bit[i];
        }
        return ret;
    }
    int query(int l, int r)
    {
        return query(r) - query(l);
    }
};

int main()
{
    cin.tie(0)->sync_with_stdio(0);
    int n;
    cin >> n;
    int N = 2 * n;
    string a;
    cin >> a;
    vector<int> b, c;
    for (int i = 0; i < N; i++)
    {
        if (a[i] == 'B')
        {
            b.push_back(i);
        }
        else
        {
            c.push_back(i);
        }
    }
    auto solve = [&](int t) -> long long
    {
        vector<pair<int, int>> res;
        for (int i = 0; i < t; i++)
        {
            res.emplace_back(min(b[i], c[n - t + i]), max(b[i], c[n - t + i]));
        }
        for (int i = t; i < n; i++)
        {
            res.emplace_back(min(b[i], c[i - t]), max(b[i], c[i - t]));
        }
        sort(res.begin(), res.end(), [&](pair<int, int> x, pair<int, int> y)
        {
            if (x.second != y.second)
            {
                return x.second < y.second;
            }
            return x.first < y.first;
        });
        long long ret = 0;
        BIT bit(2 * n);
        for (auto &[l, r] : res)
        {
            ret += bit.query(l, r);
            bit.add(l + 1, -1);
            bit.add(r + 1, 1);
        }
        return ret;
    };
    long long ans = 0;
    for (int i = 0; i <= n; i++)
    {
        ans = max(ans, solve(i));
    }
    cout << ans << '\n';
    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 5 ms 348 KB Output is correct
15 Correct 5 ms 348 KB Output is correct
16 Correct 6 ms 348 KB Output is correct
17 Correct 5 ms 344 KB Output is correct
18 Correct 3 ms 600 KB Output is correct
19 Correct 4 ms 348 KB Output is correct
20 Correct 5 ms 348 KB Output is correct
21 Correct 3 ms 348 KB Output is correct
22 Correct 4 ms 344 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 3 ms 348 KB Output is correct
25 Correct 3 ms 464 KB Output is correct
26 Correct 4 ms 344 KB Output is correct
27 Correct 4 ms 344 KB Output is correct
28 Correct 5 ms 348 KB Output is correct
29 Correct 3 ms 452 KB Output is correct
30 Correct 3 ms 348 KB Output is correct
31 Correct 4 ms 468 KB Output is correct
32 Correct 5 ms 600 KB Output is correct
33 Correct 5 ms 348 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 5 ms 348 KB Output is correct
15 Correct 5 ms 348 KB Output is correct
16 Correct 6 ms 348 KB Output is correct
17 Correct 5 ms 344 KB Output is correct
18 Correct 3 ms 600 KB Output is correct
19 Correct 4 ms 348 KB Output is correct
20 Correct 5 ms 348 KB Output is correct
21 Correct 3 ms 348 KB Output is correct
22 Correct 4 ms 344 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 3 ms 348 KB Output is correct
25 Correct 3 ms 464 KB Output is correct
26 Correct 4 ms 344 KB Output is correct
27 Correct 4 ms 344 KB Output is correct
28 Correct 5 ms 348 KB Output is correct
29 Correct 3 ms 452 KB Output is correct
30 Correct 3 ms 348 KB Output is correct
31 Correct 4 ms 468 KB Output is correct
32 Correct 5 ms 600 KB Output is correct
33 Correct 5 ms 348 KB Output is correct
34 Correct 216 ms 504 KB Output is correct
35 Correct 213 ms 504 KB Output is correct
36 Correct 215 ms 512 KB Output is correct
37 Correct 193 ms 348 KB Output is correct
38 Correct 176 ms 508 KB Output is correct
39 Correct 180 ms 504 KB Output is correct
40 Correct 155 ms 348 KB Output is correct
41 Correct 150 ms 508 KB Output is correct
42 Correct 214 ms 508 KB Output is correct
43 Correct 158 ms 500 KB Output is correct
44 Correct 194 ms 508 KB Output is correct
45 Correct 188 ms 344 KB Output is correct
46 Correct 199 ms 596 KB Output is correct
47 Correct 218 ms 504 KB Output is correct
48 Correct 176 ms 348 KB Output is correct
49 Correct 166 ms 504 KB Output is correct
50 Correct 189 ms 500 KB Output is correct
51 Correct 156 ms 344 KB Output is correct
52 Correct 224 ms 348 KB Output is correct

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 5 ms 348 KB Output is correct
15 Correct 5 ms 348 KB Output is correct
16 Correct 6 ms 348 KB Output is correct
17 Correct 5 ms 344 KB Output is correct
18 Correct 3 ms 600 KB Output is correct
19 Correct 4 ms 348 KB Output is correct
20 Correct 5 ms 348 KB Output is correct
21 Correct 3 ms 348 KB Output is correct
22 Correct 4 ms 344 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 3 ms 348 KB Output is correct
25 Correct 3 ms 464 KB Output is correct
26 Correct 4 ms 344 KB Output is correct
27 Correct 4 ms 344 KB Output is correct
28 Correct 5 ms 348 KB Output is correct
29 Correct 3 ms 452 KB Output is correct
30 Correct 3 ms 348 KB Output is correct
31 Correct 4 ms 468 KB Output is correct
32 Correct 5 ms 600 KB Output is correct
33 Correct 5 ms 348 KB Output is correct
34 Correct 216 ms 504 KB Output is correct
35 Correct 213 ms 504 KB Output is correct
36 Correct 215 ms 512 KB Output is correct
37 Correct 193 ms 348 KB Output is correct
38 Correct 176 ms 508 KB Output is correct
39 Correct 180 ms 504 KB Output is correct
40 Correct 155 ms 348 KB Output is correct
41 Correct 150 ms 508 KB Output is correct
42 Correct 214 ms 508 KB Output is correct
43 Correct 158 ms 500 KB Output is correct
44 Correct 194 ms 508 KB Output is correct
45 Correct 188 ms 344 KB Output is correct
46 Correct 199 ms 596 KB Output is correct
47 Correct 218 ms 504 KB Output is correct
48 Correct 176 ms 348 KB Output is correct
49 Correct 166 ms 504 KB Output is correct
50 Correct 189 ms 500 KB Output is correct
51 Correct 156 ms 344 KB Output is correct
52 Correct 224 ms 348 KB Output is correct
53 Execution timed out 2011 ms 6616 KB Time limit exceeded
54 Halted 0 ms 0 KB -