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from typing import Callable
Real = Callable[[int], int]
def add(f: Real, g: Real) -> Real:
def sum_func(n: int) -> int:
if n == 0:
# Calculate the integer part
return f(0) + g(0)
else:
# Calculate the decimal parts
f_decimal = f(n)
g_decimal = g(n)
return (f_decimal + g_decimal) % 10
return sum_funcfrom typing import Callable
Real = Callable[[int], int]
def add(f: Real, g: Real) -> Real:
def sum_func(n: int) -> int:
if n == 0:
# Calculate the integer part
return f(0) + g(0)
else:
# Calculate the decimal parts with carry-over
carry = sum_func(n - 1) // 10 if n > 1 else (f(0) + g(0)) // 10
f_decimal = f(n)
g_decimal = g(n)
total = f_decimal + g_decimal + carry
return total % 10
return sum_func