n is negative or positive.x to a string for easy insertion.n is positive:
a. Iterate through the digits of n.
b. If the current digit is less than x, insert x before this digit and return the new string.
c. If no such digit is found, append x at the end.n is negative:
a. Iterate through the digits of n, starting from index 1.
b. If the current digit is greater than x, insert x before this digit and return the new string.
c. If no such digit is found, append x at the end.