toBase

def tobase(num, base):
    base_num = ""
    if num < 0:
        sign="-"
        num = -num
    else:
        sign = ""
    while num > 0:
        d = int(num % base)
        base_num += str(d) if d < 10 else chr(ord('A')+ d - 10)
        num //= base
    base_num = sign+base_num[::-1]
    return base_num
num, base = input("Введите десятичное число и основание: ").split()
print(tobase(int(num),int(base)))