What is this digit operation?
0 -> 0
1 -> 9
121 -> 9
44 -> 6
15 -> 5
1243 -> 7
Inner product of two vectors
Upper triangular matrix
What is the scope of variables in Matlab ?
Find the path through the cell
Longest Collatz Sequence
Can you beat the lottery again (for hardcore coder) ?
Decrypt the cypher using XOR encryption (for beginners)
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