a = input().split()
x = int(a[0])
y = int(a[1])
z = int(a[2])
su = x + y + z
print(su)
print("%.1f" % (su / 3))
/**************************************************************
	Problem: 1602
	User: admin
	Language: Python
	Result: Accepted
	Time:103 ms
	Memory:34480 kb
****************************************************************/