2011. Final Value of Variable After Performing Operations

There is a programming language with only four operations and one variable X:

• ++X and X++ increments the value of the variable X by 1.

• --X and X-- decrements the value of the variable X by 1.

Initially, the value of X is 0.

Given an array of strings operations containing a list of operations, return the final value of X after performing all the operations.

Two strings word1 and word2 are considered almost equivalent if the differences between the frequencies of each letter from 'a' to 'z' between word1 and word2 is at most 3.

Given two strings word1 and word2, each of length n, return true if word1 and word2 are almost equivalent, or false otherwise.

The frequency of a letter x is the number of times it occurs in the string.

Success

Details 

Runtime: 1 ms, faster than 83.93% of Java online submissions for Final Value of Variable After Performing Operations.

Memory Usage: 40.1 MB, less than 36.40% of Java online submissions for Final Value of Variable After Performing Operations.