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Problem 55. Counting Sequence

Given a vector x, find the "counting sequence" y.

A counting sequence is formed by "counting" the entries in a given sequence.

For example, the sequence

 x = 5, 5, 2, 1, 1, 1, 1, 3

can be read as

 Two 5's, one 2, four 1's, one 3

which translates to

 y = 2, 5, 1, 2, 4, 1, 1, 3

So y is the counting sequence for x.

For this problem, all elements in the sequences x and y will be in the range from 1 to 9.

Solution Stats

45.13% Correct | 54.87% Incorrect
Last solution submitted on Oct 20, 2017

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