number = 100
s = ''
while number > 0:
s += str(number % 2) # 2 - система счисления
number //= 2 # 2 - система счисления
s = s[::-1]
print(s) # result: 1100100
number = 100
s = ''
while number > 0:
s += str(number % 3)
number //= 3
s = s[::-1]
print(s)