shunfurh 于 2017.09.19 13:36 提问

Crazy Search

Description

Many people like to solve hard puzzles some of which may lead them to madness. One such puzzle could be finding a hidden prime number in a given text. Such number could be the number of different substrings of a given size that exist in the text. As you soon will discover, you really need the help of a computer and a good algorithm to solve such a puzzle.
Your task is to write a program that given the size, N, of the substring, the number of different characters that may occur in the text, NC, and the text itself, determines the number of different substrings of size N that appear in the text.

As an example, consider N=3, NC=4 and the text "daababac". The different substrings of size 3 that can be found in this text are: "daa"; "aab"; "aba"; "bab"; "bac". Therefore, the answer should be 5.
Input

The first line of input consists of two numbers, N and NC, separated by exactly one space. This is followed by the text where the search takes place. You may assume that the maximum number of substrings formed by the possible set of characters does not exceed 16 Millions.
Output

The program should output just an integer corresponding to the number of different substrings of size N found in the given text.
Sample Input

3 4
daababac
Sample Output

5

1个回答

devmiao      2017.10.04 09:21

hdu 1381 Crazy Search

POJ1200 Crazy Search

Crazy Search

POJ1200 Crazy Search（hash）

poj 1200 Crazy Search

Crazy Search (P1200)

poj-1200 Crazy Search
Language: Default Crazy Search Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 19424   Accepted: 5506 Description Many people like to solve hard puzzles some
（POJ - 1200）Crazy Search
（POJ - 1200）Crazy Search Many people like to solve hard puzzles some of which may lead them to madness. One such puzzle could be finding a hidden prime number in a given text. Such number could be the number of
POJ 1200 Crazy Search 笔记

[POJ] 1200 Crazy Search [HASH]