This problem requires more test cases. My solution as many others would fail for a case in which the searched substring is not ordered.
Back and Forth Rows
Omit columns averages from a matrix
How many trades represent all the profit?
Add two numbers
Find the maximum two numbers of every column of a matrix
longest common semi-substring
Let's see how peculiar we can get
FIFA World Cup 2014 : Offside
Graph Algorithms - 1 : Length of the largest closed path
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