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Add problem 15 in julia

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Felix Cremer 2017-08-09 18:37:45 +02:00
parent 047060dfbb
commit f1434adda3
1 changed files with 26 additions and 0 deletions
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e0015/euler0015.jl Normal file
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function euler0015(n::Integer)
n=big(n)
Int(div(prod(n+1:2n,1),factorial(big(n))))
end
function euler0015_2(n::Integer)
factorial(2*big(n))/factorial(big(n))^2
end
function euler0015_3(n::Integer)
n=big(n)
prod(n+1:2n,1)//factorial(big(n))
end
euler0015(3)
@time result=euler0015(big(20))
println(result)
euler0015_2(3)
@time result=euler0015_2(big(20))
println(Int(result))
euler0015_3(3)
@time result=euler0015_3(big(20))
println(result)