Find the sum, given the first term t1, the common ratio r, and number of terms n.
If input t1=1, r=1, n=7 then output y=7
If input t1=10, r=10, n=5 then output y=111110.
Make one big string out of two smaller strings
Find best domino orientation
Stuff the Board
Who has power to do everything in this world?
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swap sign sum & multiply castles
Given a square and a circle, please decide whether the square covers more area.
Given an unsigned integer x, find the largest y by rearranging the bits in x
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