def calc_10_16():
print("Введите число:")
num=input()
from_base=10
to_base=16
if isinstance(num, str):
n = int(num, from_base)
else:
n = int(num)
alphabet = "0123456789ABCDEF"
if n < to_base:
print(alphabet[n])
else:
b = ''
z = 0
x = ''
while n >= to_base:
z = n // 16
x = n % 16
b = alphabet[x] + b
n = n // 16
b = alphabet[n] + b
print('Число в 16-ной системе счисления: ', b)
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