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Suppose you are reading a string of integers. Every once in a while, you want to be able to find the rank of the number x (the number of values less than or equal to x). Implement data structures and algorithms to support these operations, namely:

Implement the track(int x) method, which is called every time a number is read;

Implement the getRankOfNumber(int x) method to return the number of values less than or equal to x.

A: I'm sorry. B: I'm sorry. C: I'm sorry

Examples:

Input:

["StreamRank", "getRankOfNumber", "track", "getRankOfNumber"]

[[], [1], [0], [0]]

Output:

[null,0,null,1]

Tip:

x

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