Subtract Without Subtract

Published by Matt in
bit_operationsmathnumbers

Create a function that subtracts one positive integer from another, without using any arithmetic operators such as -, %, /, +, etc.

Examples

my_sub(5, 9) ➞ 4

my_sub(10, 30) ➞ 20

my_sub(0, 0) ➞ 0

Notes

  • Do not multiply by -1.
  • Use bitwise operations only: <<, |, ~, &, etc.
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