add 2011

Author: luliyucoordinate

README.md

@@ -781,6 +781,7 @@ LeetCode
 |1827|[Minimum Operations to Make the Array Increasing](https://leetcode.com/problems/minimum-operations-to-make-the-array-increasing/)||[c++](./src/1827-Minimum-Operations-to-Make-the-Array-Increasing/1827.cpp)||||||Easy|
 |1832|[Check if the Sentence Is Pangram](https://leetcode.com/problems/check-if-the-sentence-is-pangram/)||[c++](./src/1832-Check-if-the-Sentence-is-Pangram/1832.cpp)|[python](./src/1832-Check-if-the-Sentence-is-Pangram/1832.py)|||||Easy|
 |1926|[Minimum Number of Operations to Sort a Binary Tree by LevelNearest Exit from Entrance in Maze](https://leetcode.com/problems/nearest-exit-from-entrance-in-maze/)||[c++](./src/1926-Nearest-Exit-from-Entrance-in-Maze/1926.cpp)||||||Medium|
+|2011|[Final Value of Variable After Performing Operations](https://leetcode.com/problems/final-value-of-variable-after-performing-operations/)||[c++](./src/2011-Final-Value-of-Variable-After-Performing-Operations/2011.cpp)||||||Easy|
 |2225|[Find Players With Zero or One Losses](https://leetcode.com/problems/find-players-with-zero-or-one-losses/)||[c++](./src/2225-Find-Players-With-Zero-or-One-Losses/2225.cpp)||||||Medium|
 |2256|[Minimum Average Difference](https://leetcode.com/problems/minimum-average-difference/)||[c++](./src/2256-Minimum-Average-Difference/2256.cpp)||||||Medium|
 |2389|[Longest Subsequence With Limited Sum](https://leetcode.com/problems/longest-subsequence-with-limited-sum/)||[c++](./src/2389-Longest-Subsequence-With-Limited-Sum/2389.cpp)||||||Easy|

src/2011-Final-Value-of-Variable-After-Performing-Operations/2011.cpp

@@ -0,0 +1,13 @@
+class Solution {
+ public:
+  int finalValueAfterOperations(vector<string>& operations) {
+    int res = 0;
+    for (auto& op : operations) {
+      if (op[1] == '+')
+        res++;
+      else
+        res--;
+    }
+    return res;
+  }
+};