Package g0501_0600.s0592_fraction_addition_and_subtraction

Class Solution

java.lang.Object
g0501_0600.s0592_fraction_addition_and_subtraction.Solution
public class Solution extends java.lang.Object
592 - Fraction Addition and Subtraction.

Medium

Given a string expression representing an expression of fraction addition and subtraction, return the calculation result in string format.

The final result should be an irreducible fraction. If your final result is an integer, change it to the format of a fraction that has a denominator 1. So in this case, 2 should be converted to 2/1.

Example 1:

Input: expression = “-1/2+1/2”

Output: “0/1”

Example 2:

Input: expression = “-1/2+1/2+1/3”

Output: “1/3”

Example 3:

Input: expression = “1/3-1/2”

Output: “-1/6”

Constraints:

  • The input string only contains '0' to '9', '/', '+' and '-'. So does the output.
  • Each fraction (input and output) has the format ±numerator/denominator. If the first input fraction or the output is positive, then '+' will be omitted.
  • The input only contains valid irreducible fractions , where the numerator and denominator of each fraction will always be in the range [1, 10]. If the denominator is 1, it means this fraction is actually an integer in a fraction format defined above.
  • The number of given fractions will be in the range [1, 10].
  • The numerator and denominator of the final result are guaranteed to be valid and in the range of 32-bit int.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.lang.String
    fractionAddition(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

    • fractionAddition

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