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AlexVPopov/Project Euler 2

Last active December 20, 2015 13:29
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Project Euler 2
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Project Euler 2
fib1 = 1
fib2 = 2
sum = fib2
fib = 0
until (fib >= 4000000)
fib = fib1 + fib2
fib1 = fib2
fib2 = fib
sum += fib if fib.even?
end
puts sum
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