宋品澄

from decimal import Decimal, ROUND_HALF_UP

a=int(input())
b=int(input())
c=int(input())
s=a+b+c

print(f"{a}+{b}+{c}={s}")
avg=Decimal(str(s/3)).quantize(Decimal('0.00'),rounding=ROUND_HALF_UP)
print(avg)