摘要： SubstringsTime Limit: 10000/5000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 163Accepted Submission(s): 38Problem DescriptionXXX has an array of length n. XXX wants to know that, for a given w, what is the sum of the distinct elements’ number in all substrings of le 阅读全文