convert to the base minus 2 of a number

maths/base_neg2_conversion.py

@@ -0,0 +1,37 @@
+def decimal_to_negative_base_2(num: int) -> int:
+ """
+ This function returns the number negative base 2
+ of the decimal number of the input data.
+
+ Args:
+ int: The decimal number to convert.
+
+ Returns:
+ int: The negative base 2 number.
+
+ Examples:
+ >>> decimal_to_negative_base_2(0)
+ 0
+ >>> decimal_to_negative_base_2(-19)
+ 111101
+ >>> decimal_to_negative_base_2(4)
+ 100
+ >>> decimal_to_negative_base_2(7)
+ 11011
+ """
+ if num == 0:
+ return 0
+ ans = ""
+ while num != 0:
+ num, rem = divmod(num, -2)
+ if rem < 0:
+ rem += 2
+ num += 1
+ ans = str(rem) + ans
+ return int(ans)
+
+
+if __name__ == "__main__":
+ import doctest
+
+ doctest.testmod()