text: const t = require('../t').t(require('./'));
  
  test('ex.1', () => t(123, 321))
  test('ex.2', () => t(-123, -321))
  test('ex.3', () => t(120, 21))
  test('test #0', () => t(1534236469, 0))
  
  /*LeetCode expect 0 on:
   1534236469
   2147483647
  -2147483648
  */