def maxim_de_3(x1,x2,x3):
    if x1 >= x2 and x1 >= x3:
        maxim = x1
    elif x2 >= x1 and x2 >= x3:
	maxim = x2
    elif x3 >= x1 and x3 >= x2:
	maxim = x3
    return maxim

def maxim_de_3_b(x1,x2,x3):
    if x1 >= x2:
	if x1 >= x3:
	    maxim = x1
        else:
	    maxim = x3
    else:
        if x2 >= x3:
	    maxim = x2
        else:
            maxim = x3
    return maxim

def maxim_de_3_c(x1,x2,x3):
    maxim = x1
    if x2 > maxim:
	maxim = x2
    if x3 > maxim:
        maxim = hx3
    return maxim