oj.uz

Submission #708344

# Submission time Handle Problem Language Result Execution time Memory
708344 2023-03-11T15:32:12 Z Cyanmond Monochrome Points (JOI20_monochrome) C++17
35 / 100
 2000 ms 10960 KB 
#include <bits/stdc++.h>

using i64 = long long;

int main() {
    int N;
    std::cin >> N;
    std::string S;
    std::cin >> S;
    std::vector<int> blackPos, whitePos;
    for (int i = 0; i < 2 * N; ++i) {
        if (S[i] == 'B') blackPos.push_back(i);
        if (S[i] == 'W') whitePos.push_back(i);
    }
    for (int i = 0; i < 3 * N; ++i) blackPos.push_back(blackPos[i] + 2 * N);
    for (int i = 0; i < 3 * N; ++i) whitePos.push_back(whitePos[i] + 2 * N);

    auto calc = [&](const int w) {
        // blackPos[i] - whitePos[i + w]
        std::vector<std::pair<int, int>> ps;
        for (int i = 0; i < N; ++i) {
            int a = blackPos[i], b = whitePos[i + w];
            while (b >= 2 * N) b -= 2 * N;
            ps.push_back({a, b});
        }
        i64 cnt = 0;
        std::vector<int> ids;
        for (int i = 0; i < N; ++i) {
            if (blackPos[i] > whitePos[i + w]) {
                ids.push_back(i);
                std::swap(blackPos[i], whitePos[i + w]);
                std::swap(blackPos[i + N], whitePos[i + N + w]);
                std::swap(blackPos[i + 2 * N], whitePos[i + 2 * N + w]);
            }
        }
        for (int i = 0; i < N; ++i) {
            int b = i + 1;
            while (b != i and blackPos[b] < whitePos[i + w] and whitePos[b + w] < blackPos[i] + 2 * N) {
                ++b;
            }
            cnt += b - i - 1;
        }
        for (const int i : ids) {
            std::swap(blackPos[i], whitePos[i + w]);
            std::swap(blackPos[i + N], whitePos[i + N + w]);
            std::swap(blackPos[i + 2 * N], whitePos[i + 2 * N + w]);
        }
        return cnt;
    };

    int l = -1, r = N;
    while (r - l > 2) {
        int x1 = (2 * l + r) / 3, x2 = (l + 2 * r) / 3;
        const auto v1 = calc(x1), v2 = calc(x2);
        if (v1 > v2) r = x2;
        else l = x1;
    }
    std::cout << calc((l + r) / 2) << std::endl;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 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 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 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 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 2 ms 212 KB Output is correct
15 Correct 2 ms 212 KB Output is correct
16 Correct 2 ms 212 KB Output is correct
17 Correct 2 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 2 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 2 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 300 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 2 ms 296 KB Output is correct
27 Correct 2 ms 212 KB Output is correct
28 Correct 2 ms 212 KB Output is correct
29 Correct 1 ms 324 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 300 KB Output is correct
32 Correct 2 ms 212 KB Output is correct
33 Correct 2 ms 300 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 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 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 2 ms 212 KB Output is correct
15 Correct 2 ms 212 KB Output is correct
16 Correct 2 ms 212 KB Output is correct
17 Correct 2 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 2 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 2 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 300 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 2 ms 296 KB Output is correct
27 Correct 2 ms 212 KB Output is correct
28 Correct 2 ms 212 KB Output is correct
29 Correct 1 ms 324 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 300 KB Output is correct
32 Correct 2 ms 212 KB Output is correct
33 Correct 2 ms 300 KB Output is correct
34 Correct 81 ms 340 KB Output is correct
35 Correct 43 ms 340 KB Output is correct
36 Correct 43 ms 340 KB Output is correct
37 Correct 42 ms 340 KB Output is correct
38 Correct 39 ms 340 KB Output is correct
39 Correct 44 ms 340 KB Output is correct
40 Correct 52 ms 384 KB Output is correct
41 Correct 33 ms 340 KB Output is correct
42 Correct 44 ms 340 KB Output is correct
43 Correct 47 ms 396 KB Output is correct
44 Correct 49 ms 340 KB Output is correct
45 Correct 38 ms 380 KB Output is correct
46 Correct 78 ms 340 KB Output is correct
47 Correct 50 ms 396 KB Output is correct
48 Correct 44 ms 400 KB Output is correct
49 Correct 35 ms 340 KB Output is correct
50 Correct 48 ms 340 KB Output is correct
51 Correct 70 ms 400 KB Output is correct
52 Correct 43 ms 400 KB Output is correct

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 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 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 2 ms 212 KB Output is correct
15 Correct 2 ms 212 KB Output is correct
16 Correct 2 ms 212 KB Output is correct
17 Correct 2 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 2 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 2 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 300 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 2 ms 296 KB Output is correct
27 Correct 2 ms 212 KB Output is correct
28 Correct 2 ms 212 KB Output is correct
29 Correct 1 ms 324 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 300 KB Output is correct
32 Correct 2 ms 212 KB Output is correct
33 Correct 2 ms 300 KB Output is correct
34 Correct 81 ms 340 KB Output is correct
35 Correct 43 ms 340 KB Output is correct
36 Correct 43 ms 340 KB Output is correct
37 Correct 42 ms 340 KB Output is correct
38 Correct 39 ms 340 KB Output is correct
39 Correct 44 ms 340 KB Output is correct
40 Correct 52 ms 384 KB Output is correct
41 Correct 33 ms 340 KB Output is correct
42 Correct 44 ms 340 KB Output is correct
43 Correct 47 ms 396 KB Output is correct
44 Correct 49 ms 340 KB Output is correct
45 Correct 38 ms 380 KB Output is correct
46 Correct 78 ms 340 KB Output is correct
47 Correct 50 ms 396 KB Output is correct
48 Correct 44 ms 400 KB Output is correct
49 Correct 35 ms 340 KB Output is correct
50 Correct 48 ms 340 KB Output is correct
51 Correct 70 ms 400 KB Output is correct
52 Correct 43 ms 400 KB Output is correct
53 Execution timed out 2045 ms 10960 KB Time limit exceeded
54 Halted 0 ms 0 KB -