def obliczenieMinimum(a, b):
    min=1000
    c=0
    delta=0.01
    omega=0.02
    while (b-a)>omega:
        c=(b+a)/2
        if (c-4+delta)*(c-4+delta)<(c-4-delta)*(c-4-delta):
            a=c
            min=c
        else:
            min = c
            b=c
    return min