Codility - Lesson 2 Frog-River-One (100/100) Max-Counters (88/100)

frog-river-one.rb

def solution(x, a)
    counter = 0
    path = {}
    if x != nil and a != nil
        if x > 0 and a.length > 0
            pos = 0
            a.each do |i|
                if !path.key?(i) and i <= x
                    counter += 1
                end
                
                if counter == x
                    return pos
                end
                
                path[i] = true
                pos += 1
            end
        end
    end
    return -1
end

max-counters.rb

def solution(n, a)
    v = [0] * n
    max = 0
    if n != nil and a != nil
        if n > 0 and a.length > 0
            a.each do |i|
                if i > n
                    v = Array.new(n,max)
                else
                    v[i-1] += 1
                    max = v[i-1] if v[i-1] > max
                end
            end
        end
    end
    return v
end