LeetCode 2011: Final Value of Variable After Performing Operations Solution
Master LeetCode problem 2011 (Final Value of Variable After Performing Operations), a easy challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.
2011. Final Value of Variable After Performing Operations
Problem Explanation
Explanation:
To solve this problem, we can iterate through the array of operations and update the value of variable X based on the operation. For each operation, we check whether it increments or decrements X, and update X accordingly. Finally, we return the final value of X.
- Initialize X to 0.
- Iterate through the operations array.
- For each operation:
- If it is "++X" or "X++", increment X by 1.
- If it is "--X" or "X--", decrement X by 1.
- Return the final value of X.
Time Complexity:
- The time complexity of this solution is O(N), where N is the number of operations in the array.
Space Complexity:
- The space complexity of this solution is O(1) as we are using a constant amount of extra space.
:
Solution Code
class Solution {
public int finalValueAfterOperations(String[] operations) {
int X = 0;
for (String op : operations) {
if (op.equals("++X") || op.equals("X++")) {
X++;
} else {
X--;
}
}
return X;
}
}Try It Yourself
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