Construct the De Bruijn Graph of a String solved by 1275

Given a genome Text, PathGraph_k(Text) is the path consisting of |Text| - k + 1 edges, where the i-th edge of this path is labeled by the i-th k-mer in Text and the i-th node of the path is labeled by the i-th (k - 1)-mer in Text. The de Bruijn graph DeBruijn_k(Text) is formed by gluing identically labeled nodes in PathGraph_k(Text).

De Bruijn Graph from a String Problem

Construct the de Bruijn graph of a string.

Given: An integer k and a string Text.

Return:DeBruijn_k(Text), in the form of an adjacency list.

Sample Dataset

4
AAGATTCTCTAC

Sample Output

AAG -> AGA
AGA -> GAT
ATT -> TTC
CTA -> TAC
CTC -> TCT
GAT -> ATT
TCT -> CTA,CTC
TTC -> TCT

Extra Dataset

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