Given an integer, return its base 7 string representation.
Example
1:
Input: 100
Output: "202"
Example
2:
Input: -
7
Output: "-10"
Note: The input will be in range of [-1e7, 1e7].
class Solution(object):
def convertToBase7(self, num):
abs_num = abs(num)
base_str =
''
while abs_num >=
7:
base_str += str(int(abs_num) %
7)
abs_num /=
7
base_str += str(int(abs_num))
if num >=
0:
return base_str[::-
1]
else:
return '-' + base_str[::-
1]
