
def detTriangleArea(inputs):
    a = int(inputs.split(" ")[0])
    b = int(inputs.split(" ")[1])
    c = int(inputs.split(" ")[2])
    s = (a+b+c)/2
    area = (s * (s-a) * (s-b) * (s-c))**0.5
    print(area)
detTriangleArea(input())
=======
print("input your Text:")
a = input()
B= "😃"
Print("result is:")
print(a+B)
#hellow this is test code in test.py
