시간 제한 | 메모리 제한 | 제출 | 정답 | 맞힌 사람 | 정답 비율 |
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1 초 | 128 MB | 0 | 0 | 0 | 0.000% |
By a word we mean a sequence of capital letters of the English alphabet. The length of a word is the number of letters contained in it. This way, word α = ABAACBBBA
is of length 9. By a block within a word we understand maximal consistent subsequence of the same letters. A word is called t-hard, if it contains t blocks. Taking into consideration the word α, it turns out to be 6-hard, because it consists of the following blocks: A|B|AA|C|BBB|A
.
If two given words are of the same length, it is possible to check how different they are. Two words of the length n are k-different, if for exactly k positions i (1 ≤ i ≤ n), i'th letter of the first word is different from i'th letter of the second word. Checking two words α and β = AAAABBBBB
, it turns out that they are 3-different.
For a given word α, we want to find not too different word β, so that it is not too complicated. Your task is to define, how simple β can be.
Write a program which:
In the first line of the standard input there are two integers n, k separated with a single space (1 ≤ n ≤ 1 000, 0 ≤ k ≤ n). They represent adequately: the length of the word α and the allowed level of difference. In the second line there are exactly n capital letters forming the word α.
One integer is to be written to the standard output - t.
9 3 ABAACBBBA
2
Contest > Algorithmic Engagements > PA 2006 4-3번