def poly(func,x):
    answer=0
    for coex in func:
        polyterm=coex[0]*x**coex[1]
        answer= answer+polyterm
    return answer

def f_of(x):
    return x**3+5*x**2+x-6




def root_a(f, left, right):
    left = float(left)
    right = float(right)

    if left > right :
        tmp = a
        left = right
        right = tmp

    mid = (right+left)/2

    while right-left > 0.000001 :
        if poly.poly(f, mid)*poly.poly(f, left) < 0 :
            right = mid
        else:
            left = mid
        mid = (right+left)/2
        print mid
    return mid


def root_b(left, right):
    left = float(left)
    right = float(right)

    if left > right :
        tmp = left
        left = right
        right = tmp

    mid = (right+left)/2

    while right-left > 0.000001 :
        if f_of(mid)*f_of(left) < 0 :
            right = mid
        else:
            left = mid
        mid = (right+left)/2
        print mid
    return mid