# Extracts the first n digits from a large integer.
# Python's built-in int type already supports arbitrarily large values,
# so converting the number to a string is the most direct and efficient way
# to access its digits.
def first_n_digits(value: int, n: int) -> str:
# Convert the integer to its decimal string representation.
s = str(value)
# If n exceeds the number of digits, return the whole number.
if n >= len(s):
return s
# Return the first n characters (digits).
return s[:n]
def main():
# Define a very large integer directly.
# Python handles large integers seamlessly.
big_number = 9876543210987654321098765432109876543210
# Choose how many digits to extract.
n = 18
# Extract the first n digits.
result = first_n_digits(big_number, n)
# Display the result.
print(f"First {n} digits:", result)
if __name__ == "__main__":
main()
"""
run:
First 18 digits: 987654321098765432
"""
