def calc(x)
    (1..100000).bsearch {|k| x < k*(k+1)/2 }-1
end

def bye(x)
    p x
    exit
end
    
n = gets.to_i

lis = []

1.upto(4500) do |k|
    lis << k*(k+1)/2
end

bye 1 if lis.bsearch{|x| n <=> x}

lis.each do |x|
    bye 2 if lis.bsearch{|y| n <=> x+y}
end
bye 3