Package g2201_2300.s2232_minimize_result_by_adding_parentheses_to_expression

Class Solution

java.lang.Object
g2201_2300.s2232_minimize_result_by_adding_parentheses_to_expression.Solution
public class Solution extends java.lang.Object
2232 - Minimize Result by Adding Parentheses to Expression.

Medium

You are given a 0-indexed string expression of the form "<num1>+<num2>" where <num1> and <num2> represent positive integers.

Add a pair of parentheses to expression such that after the addition of parentheses, expression is a valid mathematical expression and evaluates to the smallest possible value. The left parenthesis must be added to the left of '+' and the right parenthesis must be added to the right of '+'.

Return expression after adding a pair of parentheses such that expression evaluates to the smallest possible value. If there are multiple answers that yield the same result, return any of them.

The input has been generated such that the original value of expression, and the value of expression after adding any pair of parentheses that meets the requirements fits within a signed 32-bit integer.

Example 1:

Input: expression = “247+38”

Output: “2(47+38)”

Explanation: The expression evaluates to 2 * (47 + 38) = 2 * 85 = 170.

Note that “2(4)7+38” is invalid because the right parenthesis must be to the right of the '+'.

It can be shown that 170 is the smallest possible value.

Example 2:

Input: expression = “12+34”

Output: “1(2+3)4”

Explanation: The expression evaluates to 1 * (2 + 3) * 4 = 1 * 5 * 4 = 20.

Example 3:

Input: expression = “999+999”

Output: “(999+999)”

Explanation: The expression evaluates to 999 + 999 = 1998.

Constraints:

  • 3 <= expression.length <= 10
  • expression consists of digits from '1' to '9' and '+'.
  • expression starts and ends with digits.
  • expression contains exactly one '+'.
  • The original value of expression, and the value of expression after adding any pair of parentheses that meets the requirements fits within a signed 32-bit integer.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.lang.String
    minimizeResult(java.lang.String expression)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • minimizeResult

      public java.lang.String minimizeResult(java.lang.String expression)