Question: Given the text T, consider the problem of counting the number of substrings in T that starts with A and ends with B. For example,

Given the text T, consider the problem of counting the number of substrings in T that starts with A and ends with B. For example, there are four such substrings in CABAAXBYA. They are AB, ABAAXB, AAXB and AXB

1. Write a brute force algorithm for this problem and determine its time complexity

2. Write a more efficient algorithm and determine its time complexity

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