Solution 1 - Count +/− Operations

Each op increments if it contains '+', else decrements.

TimeComplexity: O(n)

SpaceComplexity: O(1)

""" 2011.1 - Final Value of Variable After Performing Operations - Solution 1 """

from typing import List

class Solution:
    def finalValueAfterOperations(self, operations: List[str]) -> int:
        x = 0
        for op in operations:
            x += 1 if "+" in op else -1
        return x

package main

import "strings"

func finalValueAfterOperations(operations []string) int {
	x := 0
	for _, op := range operations {
		if strings.Contains(op, "+") { x++ } else { x-- }
	}
	return x
}

func main() {}

2011 - Final Value of Variable After Performing Operations

Solution 1 - Count +/− Operations