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01-K CodeTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 968 Accepted Submission(s): 328 Problem Description Consider a code string S of N symbols, each symbol can only be 0 or 1. In any consecutive substring of S, the number of 0's differs from the number of 1's by at most K. How many such valid code strings S are there? For example, when N is 4, and K is 3, there are two invalid codes: 0000 and 1111. Input The input consists of several test cases. For each case, there are two positive integers N and K in a line. N is in the range of [1, 62]. K is in the range of [2, 5]. Output Output the number of valid code strings in a line for each case. Sample Input
Sample Output
Author ZHENG, Jianqiang Source | ||||||||||
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