Xa = float(input("abscissa do ponto A(Xa)"))
Ya = float(input("ordenada do ponto A(Ya)"))
Xb = float(input("abscissa do ponto B(Xb)"))
Yb = float(input("abscissa do ponto Y(yb)"))

Xm= (Xb + Xa)/2
Ym= (Yb + Ya)/2

print(round(Xm ,1))
print(round(Ym ,1))
