# your code goes here
a = int(raw_input())
b = int(raw_input())
c = int(raw_input())
z = a + b + c
print z
IyB5b3VyIGNvZGUgZ29lcyBoZXJlCmEgPSBpbnQocmF3X2lucHV0KCkpIApiID0gaW50KHJhd19pbnB1dCgpKQpjID0gaW50KHJhd19pbnB1dCgpKQp6ID0gYSArIGIgKyBjCnByaW50IHo=