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Does it means 1<= x <= N? So for N=2, x will be 1 and 2 when x=1, don't add to sum because it is not irrational number
Project Euler #80: Square root digital expansion
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Does it means 1<= x <= N? So for N=2, x will be 1 and 2 when x=1, don't add to sum because it is not irrational number