oj.uz

Submission #595076

# Submission time Handle Problem Language Result Execution time Memory
595076 2022-07-13T10:33:00 Z elkernos Monochrome Points (JOI20_monochrome) C++17
100 / 100
 50 ms 5324 KB 
#include <bits/stdc++.h>

using namespace std;

#define int long long

int32_t main()
{
    cin.tie(0)->sync_with_stdio(0);
    int n;
    cin >> n;
    vector<int> white, red;
    for(int i = 1; i <= 2 * n; i++) {
        char c;
        cin >> c;
        if(c == 'W') {
            white.emplace_back(i);
        }
        else {
            red.emplace_back(i);
        }
    }
    if(red[0] == 1) {
        swap(red, white);
    }
    int ans = 0;
    auto solve_for = [&](int k) {
        auto dist = [&](int i, int j) {
            int len = abs(j - i) - 1;
            return min(len, 2 * n - len - 2);
        };
        int cnt = 0;
        for(int i = 0; i < n; i++) {
            cnt += dist(white[i], red[(i + k) % n]);
        }
        ans = max(ans, cnt);
        return cnt;
    };
    int L = solve_for(0), R = solve_for(n - 1);
    if(L > R) {
        int l = 1, r = n - 2;
        while(l <= r) {
            int m = (l + r) / 2;
            int v1 = solve_for(m);
            if(v1 <= R) {
                r = m - 1;
                continue;
            }
            int v2 = solve_for(m + 1);
            if(v1 < v2) {
                l = m + 2;
            }
            else {
                r = m - 1;
            }
        }
    }
    else {
        int l = 1, r = n - 2;
        while(l <= r) {
            int m = (l + r) / 2;
            int v1 = solve_for(m);
            if(v1 <= L) {
                l = m + 1;
                continue;
            }
            int v2 = solve_for(m + 1);
            if(v1 < v2) {
                l = m + 2;
            }
            else {
                r = m - 1;
            }
        }
    }
    cout << ans / 2 << '\n';
}

Subtask #1
4.0 / 4.0

# 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 1 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 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 320 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 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 0 ms 212 KB Output is correct
3 Correct 1 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 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 320 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 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 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 0 ms 316 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 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 320 KB Output is correct
33 Correct 1 ms 324 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 0 ms 212 KB Output is correct
3 Correct 1 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 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 320 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 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 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 0 ms 316 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 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 320 KB Output is correct
33 Correct 1 ms 324 KB Output is correct
34 Correct 1 ms 316 KB Output is correct
35 Correct 1 ms 336 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 2 ms 340 KB Output is correct
43 Correct 1 ms 316 KB Output is correct
44 Correct 1 ms 320 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 320 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 340 KB Output is correct
51 Correct 1 ms 316 KB Output is correct
52 Correct 2 ms 340 KB Output is correct

Subtask #4
65.0 / 65.0

# 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 1 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 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 320 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 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 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 0 ms 316 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 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 320 KB Output is correct
33 Correct 1 ms 324 KB Output is correct
34 Correct 1 ms 316 KB Output is correct
35 Correct 1 ms 336 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 2 ms 340 KB Output is correct
43 Correct 1 ms 316 KB Output is correct
44 Correct 1 ms 320 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 320 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 340 KB Output is correct
51 Correct 1 ms 316 KB Output is correct
52 Correct 2 ms 340 KB Output is correct
53 Correct 46 ms 3912 KB Output is correct
54 Correct 49 ms 4092 KB Output is correct
55 Correct 42 ms 3904 KB Output is correct
56 Correct 50 ms 3928 KB Output is correct
57 Correct 48 ms 4044 KB Output is correct
58 Correct 44 ms 4936 KB Output is correct
59 Correct 45 ms 3904 KB Output is correct
60 Correct 50 ms 4060 KB Output is correct
61 Correct 42 ms 3828 KB Output is correct
62 Correct 42 ms 3912 KB Output is correct
63 Correct 41 ms 3996 KB Output is correct
64 Correct 43 ms 5184 KB Output is correct
65 Correct 41 ms 3904 KB Output is correct
66 Correct 37 ms 5180 KB Output is correct
67 Correct 39 ms 5200 KB Output is correct
68 Correct 36 ms 5080 KB Output is correct
69 Correct 41 ms 4428 KB Output is correct
70 Correct 37 ms 3896 KB Output is correct
71 Correct 28 ms 5272 KB Output is correct
72 Correct 27 ms 5324 KB Output is correct
73 Correct 44 ms 4064 KB Output is correct