you only need to substract 1 inside the sum ;-)
Replace NaNs with the number that appears to its left in the row.
Find the sum of the elements in the "second" diagonal
7 segment LED display
Magic is simple (for beginners)
GJam 2014 China Rd A: Rational Number Tree (Large Values)
ismember: Enhanced Time Performance for 'rows' - Speed Scoring (90% savings)
Mastermind IV: Optimal Solver - max of 5 guesses
Unique: Enhanced Performance - Large and Wide Array - Speed Improvement (66% savings)
Kurchan 3x3 - Optimal Score
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