New variable " balls" vs prior ball. ball(2) would find the x position of the second ball. balls(5) would find y of second ball.
Find the palindrome
Back to basics 12 - Input Arguments
Use of regexp
Find last zero for each column
Compression: Encode and Decode
BattleShip - Petty Officer (Level 2)
Rubik's Cube : Solve Ten Face Move - Speed Scoring
Knots Contest: Minimum Knots (TestSuite)
Usage of mkdir and copyfile
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