Zonal Computing Olympiad is round 1 out of 3 (i.e. beginner) for selection into Indian IOI team.
why do we not need to reset j =i+1, after each increment of counter. (as in n^2 soln)?
Recursion is a fundamental technique common in mathematics and computer science. If you don't have a background or you feel yours is week then check this out: Introduction To Recursion
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