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[LeetCode] 2011. Final Value of Variable After Performing Operations c++Coding Test/LeetCode 2022. 10. 10. 16:06728x90
- 문제
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.
Input: operations = ["--X","X++","X++"] Output: 1 Explanation: The operations are performed as follows: Initially, X = 0. --X: X is decremented by 1, X = 0 - 1 = -1. X++: X is incremented by 1, X = -1 + 1 = 0. X++: X is incremented by 1, X = 0 + 1 = 1.
- 문제 해결
class Solution { public: int finalValueAfterOperations(vector<string>& operations) { int result(0); for(const auto &it : operations){ if(it[1] == '+') result += 1; else result -= 1; } return result; } };
다른 풀이
class Solution { public: int finalValueAfterOperations(vector<string>& operations) { int result(0); for(const auto &it : operations){ result = it[1] == '-' ? result - 1 : result + 1; } return result; } };
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