oj.uz

Submission #502314

# Submission time Handle Problem Language Result Execution time Memory
502314 2022-01-05T18:27:29 Z tengiz05 Monochrome Points (JOI20_monochrome) C++17
100 / 100
 892 ms 6400 KB 
#include <bits/stdc++.h>

using i64 = long long;

template <typename T>
struct Fenwick {
    int n;
    std::vector<T> a;
    Fenwick(int n) : n(n), a(n) {}
    void add(int x, T v) {
        for (int i = x + 1; i <= n; i += i & -i) {
            a[i - 1] += v;
        }
    }
    T sum(int x) {
        T ans = 0;
        for (int i = x; i > 0; i -= i & -i) {
            ans += a[i - 1];
        }
        return ans;
    }
    T rangeSum(int l, int r) {
        return sum(r) - sum(l);
    }
};

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    
    int n;
    std::cin >> n;
    
    std::string s;
    std::cin >> s;
    
    std::vector<int> a, b;
    
    for (int i = 0; i < 2 * n; i++) {
        if (s[i] == 'B') {
            a.push_back(i);
        } else {
            b.push_back(i);
        }
    }
    
    auto solve = [&](int off) {
        std::vector<std::pair<int, int>> v;
        for (int i = 0; i < n; i++) {
            int j = (i + off) % n;
            v.emplace_back(std::minmax(a[i], b[j]));
        }
        std::sort(v.begin(), v.end());
        
        i64 ans = 0;
        Fenwick<int> f(2 * n);
        for (auto [x, y] : v) {
            ans += f.rangeSum(x, y);
            f.add(y, 1);
        }
        return ans;
    };
    
    int l = 0, r = n - 1;
    while (l < r) {
        int m = (l + r) / 2;
        if (solve(m) < solve(m + 1)) {
            l = m + 1;
        } else {
            r = m;
        }
    }
    
    std::cout << solve(l) << "\n";
    
    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 316 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 316 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 0 ms 204 KB Output is correct
24 Correct 1 ms 312 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 1 ms 204 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 316 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 0 ms 204 KB Output is correct
24 Correct 1 ms 312 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 1 ms 204 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 4 ms 312 KB Output is correct
35 Correct 4 ms 388 KB Output is correct
36 Correct 4 ms 332 KB Output is correct
37 Correct 3 ms 332 KB Output is correct
38 Correct 3 ms 312 KB Output is correct
39 Correct 3 ms 332 KB Output is correct
40 Correct 3 ms 332 KB Output is correct
41 Correct 3 ms 332 KB Output is correct
42 Correct 4 ms 308 KB Output is correct
43 Correct 4 ms 332 KB Output is correct
44 Correct 4 ms 312 KB Output is correct
45 Correct 3 ms 332 KB Output is correct
46 Correct 3 ms 332 KB Output is correct
47 Correct 5 ms 332 KB Output is correct
48 Correct 3 ms 332 KB Output is correct
49 Correct 4 ms 312 KB Output is correct
50 Correct 2 ms 332 KB Output is correct
51 Correct 4 ms 332 KB Output is correct
52 Correct 4 ms 332 KB Output is correct

Subtask #4
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 316 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 0 ms 204 KB Output is correct
24 Correct 1 ms 312 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 1 ms 204 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 4 ms 312 KB Output is correct
35 Correct 4 ms 388 KB Output is correct
36 Correct 4 ms 332 KB Output is correct
37 Correct 3 ms 332 KB Output is correct
38 Correct 3 ms 312 KB Output is correct
39 Correct 3 ms 332 KB Output is correct
40 Correct 3 ms 332 KB Output is correct
41 Correct 3 ms 332 KB Output is correct
42 Correct 4 ms 308 KB Output is correct
43 Correct 4 ms 332 KB Output is correct
44 Correct 4 ms 312 KB Output is correct
45 Correct 3 ms 332 KB Output is correct
46 Correct 3 ms 332 KB Output is correct
47 Correct 5 ms 332 KB Output is correct
48 Correct 3 ms 332 KB Output is correct
49 Correct 4 ms 312 KB Output is correct
50 Correct 2 ms 332 KB Output is correct
51 Correct 4 ms 332 KB Output is correct
52 Correct 4 ms 332 KB Output is correct
53 Correct 892 ms 6296 KB Output is correct
54 Correct 824 ms 6304 KB Output is correct
55 Correct 785 ms 6316 KB Output is correct
56 Correct 840 ms 6260 KB Output is correct
57 Correct 517 ms 6192 KB Output is correct
58 Correct 579 ms 6284 KB Output is correct
59 Correct 675 ms 6276 KB Output is correct
60 Correct 671 ms 6196 KB Output is correct
61 Correct 789 ms 6208 KB Output is correct
62 Correct 701 ms 6204 KB Output is correct
63 Correct 807 ms 6284 KB Output is correct
64 Correct 657 ms 6140 KB Output is correct
65 Correct 727 ms 6016 KB Output is correct
66 Correct 507 ms 6092 KB Output is correct
67 Correct 537 ms 6244 KB Output is correct
68 Correct 681 ms 6256 KB Output is correct
69 Correct 571 ms 6400 KB Output is correct
70 Correct 652 ms 5964 KB Output is correct
71 Correct 496 ms 6356 KB Output is correct
72 Correct 799 ms 6396 KB Output is correct
73 Correct 850 ms 6400 KB Output is correct