Submission #202627

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
202627	2020-02-17T11:28:27 Z	SamAnd	JJOOII 2 (JOI20_ho_t2)	C++17	100 / 100	43 ms	2940 KB

ho_t2

#include <bits/stdc++.h>
using namespace std;
const int N = 200005;

int n, k;
char a[N];

int p[N][3];

int byn(int x, int j)
{
    int l = x, r = n;
    int ans = n + 1;
    while (l <= r)
    {
        int m = (l + r) / 2;
        if (p[m][j] - p[x - 1][j] >= k)
        {
            ans = m;
            r = m - 1;
        }
        else
            l = m + 1;
    }
    return ans;
}

int main()
{
    scanf("%d%d", &n, &k);
    scanf(" %s", (a + 1));
    for (int i = 1; i <= n; ++i)
    {
        if (a[i] == 'J')
            a[i] = 0;
        else if (a[i] == 'O')
            a[i] = 1;
        else
            a[i] = 2;
    }
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 0; j < 3; ++j)
            p[i][j] = p[i - 1][j];
        p[i][a[i]]++;
    }
    int ans = N;
    for (int i = 1; i <= n; ++i)
    {
        int x = byn(i, 0);
        x = byn(x + 1, 1);
        x = byn(x + 1, 2);
        if (x <= n)
            ans = min(ans, x - i + 1 - 3 * k);
    }
    if (ans == N)
        printf("-1\n");
    else
        printf("%d\n", ans);
    return 0;
}

Compilation message

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:45:18: warning: array subscript has type 'char' [-Wchar-subscripts]
         p[i][a[i]]++;
                  ^
ho_t2.cpp:30:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~
ho_t2.cpp:31:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf(" %s", (a + 1));
     ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	256 KB	Output is correct
2	Correct	5 ms	372 KB	Output is correct
3	Correct	5 ms	256 KB	Output is correct
4	Correct	5 ms	376 KB	Output is correct
5	Correct	5 ms	376 KB	Output is correct
6	Correct	5 ms	256 KB	Output is correct
7	Correct	5 ms	376 KB	Output is correct
8	Correct	5 ms	376 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	376 KB	Output is correct
11	Correct	5 ms	376 KB	Output is correct
12	Correct	5 ms	376 KB	Output is correct
13	Correct	5 ms	376 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct

Subtask #2
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	256 KB	Output is correct
2	Correct	5 ms	372 KB	Output is correct
3	Correct	5 ms	256 KB	Output is correct
4	Correct	5 ms	376 KB	Output is correct
5	Correct	5 ms	376 KB	Output is correct
6	Correct	5 ms	256 KB	Output is correct
7	Correct	5 ms	376 KB	Output is correct
8	Correct	5 ms	376 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	376 KB	Output is correct
11	Correct	5 ms	376 KB	Output is correct
12	Correct	5 ms	376 KB	Output is correct
13	Correct	5 ms	376 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct
15	Correct	5 ms	376 KB	Output is correct
16	Correct	5 ms	376 KB	Output is correct
17	Correct	5 ms	376 KB	Output is correct
18	Correct	5 ms	380 KB	Output is correct
19	Correct	5 ms	376 KB	Output is correct
20	Correct	5 ms	376 KB	Output is correct
21	Correct	5 ms	380 KB	Output is correct
22	Correct	5 ms	376 KB	Output is correct
23	Correct	5 ms	376 KB	Output is correct
24	Correct	5 ms	376 KB	Output is correct
25	Correct	5 ms	376 KB	Output is correct
26	Correct	5 ms	376 KB	Output is correct
27	Correct	5 ms	376 KB	Output is correct
28	Correct	5 ms	376 KB	Output is correct
29	Correct	5 ms	376 KB	Output is correct
30	Correct	5 ms	376 KB	Output is correct
31	Correct	5 ms	376 KB	Output is correct
32	Correct	5 ms	408 KB	Output is correct
33	Correct	5 ms	380 KB	Output is correct
34	Correct	5 ms	380 KB	Output is correct
35	Correct	5 ms	376 KB	Output is correct

Subtask #3
87.0 / 87.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	256 KB	Output is correct
2	Correct	5 ms	372 KB	Output is correct
3	Correct	5 ms	256 KB	Output is correct
4	Correct	5 ms	376 KB	Output is correct
5	Correct	5 ms	376 KB	Output is correct
6	Correct	5 ms	256 KB	Output is correct
7	Correct	5 ms	376 KB	Output is correct
8	Correct	5 ms	376 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	376 KB	Output is correct
11	Correct	5 ms	376 KB	Output is correct
12	Correct	5 ms	376 KB	Output is correct
13	Correct	5 ms	376 KB	Output is correct
14	Correct	5 ms	376 KB	Output is correct
15	Correct	5 ms	376 KB	Output is correct
16	Correct	5 ms	376 KB	Output is correct
17	Correct	5 ms	376 KB	Output is correct
18	Correct	5 ms	380 KB	Output is correct
19	Correct	5 ms	376 KB	Output is correct
20	Correct	5 ms	376 KB	Output is correct
21	Correct	5 ms	380 KB	Output is correct
22	Correct	5 ms	376 KB	Output is correct
23	Correct	5 ms	376 KB	Output is correct
24	Correct	5 ms	376 KB	Output is correct
25	Correct	5 ms	376 KB	Output is correct
26	Correct	5 ms	376 KB	Output is correct
27	Correct	5 ms	376 KB	Output is correct
28	Correct	5 ms	376 KB	Output is correct
29	Correct	5 ms	376 KB	Output is correct
30	Correct	5 ms	376 KB	Output is correct
31	Correct	5 ms	376 KB	Output is correct
32	Correct	5 ms	408 KB	Output is correct
33	Correct	5 ms	380 KB	Output is correct
34	Correct	5 ms	380 KB	Output is correct
35	Correct	5 ms	376 KB	Output is correct
36	Correct	34 ms	2680 KB	Output is correct
37	Correct	38 ms	2904 KB	Output is correct
38	Correct	36 ms	2808 KB	Output is correct
39	Correct	38 ms	2808 KB	Output is correct
40	Correct	31 ms	2896 KB	Output is correct
41	Correct	38 ms	2808 KB	Output is correct
42	Correct	43 ms	2936 KB	Output is correct
43	Correct	19 ms	1912 KB	Output is correct
44	Correct	22 ms	2296 KB	Output is correct
45	Correct	28 ms	2808 KB	Output is correct
46	Correct	28 ms	2808 KB	Output is correct
47	Correct	27 ms	2808 KB	Output is correct
48	Correct	28 ms	2808 KB	Output is correct
49	Correct	20 ms	2040 KB	Output is correct
50	Correct	28 ms	2808 KB	Output is correct
51	Correct	27 ms	2808 KB	Output is correct
52	Correct	18 ms	2808 KB	Output is correct
53	Correct	17 ms	2808 KB	Output is correct
54	Correct	23 ms	2940 KB	Output is correct
55	Correct	18 ms	2808 KB	Output is correct
56	Correct	15 ms	2808 KB	Output is correct

Submission #202627

Compilation message

Subtask #1 1.0 / 1.0

Subtask #2 12.0 / 12.0

Subtask #3 87.0 / 87.0

Subtask #1
1.0 / 1.0

Subtask #2
12.0 / 12.0

Subtask #3
87.0 / 87.0