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.
\n
Example 1:
\n\n\nInput: operations = ["--X","X++","X++"]\nOutput: 1\nExplanation: The operations are performed as follows:\nInitially, X = 0.\n--X: X is decremented by 1, X = 0 - 1 = -1.\nX++: X is incremented by 1, X = -1 + 1 = 0.\nX++: X is incremented by 1, X = 0 + 1 = 1.\n\n\n
Example 2:
\n\n\nInput: operations = ["++X","++X","X++"]\nOutput: 3\nExplanation: The operations are performed as follows:\nInitially, X = 0.\n++X: X is incremented by 1, X = 0 + 1 = 1.\n++X: X is incremented by 1, X = 1 + 1 = 2.\nX++: X is incremented by 1, X = 2 + 1 = 3.\n\n\n
Example 3:
\n\n\nInput: operations = ["X++","++X","--X","X--"]\nOutput: 0\nExplanation: The operations are performed as follows:\nInitially, X = 0.\nX++: X is incremented by 1, X = 0 + 1 = 1.\n++X: X is incremented by 1, X = 1 + 1 = 2.\n--X: X is decremented by 1, X = 2 - 1 = 1.\nX--: X is decremented by 1, X = 1 - 1 = 0.\n\n\n
\n
Constraints:
\n\n1 <= operations.length <= 100operations[i] will be either "++X", "X++", "--X", or "X--".Compiled with clang 11 using the latest C++ 20 standard.
Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
Most standard library headers are already included automatically for your convenience.
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Most standard library headers are already included automatically for your convenience.
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Python 2.7.12.
Most libraries are already imported automatically for your convenience, such as array, bisect, collections. If you need more libraries, you can import it yourself.
\\r\\n\\r\\nFor Map/TreeMap data structure, you may use sortedcontainers library.
\\r\\n\\r\\nNote that Python 2.7 will not be maintained past 2020. For the latest Python, please choose Python3 instead.
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Your code is compiled with level one optimization (-O1). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
Most standard library headers are already included automatically for your convenience.
\\r\\n\\r\\nFor hash table operations, you may use uthash. \\\"uthash.h\\\" is included by default. Below are some examples:
\\r\\n\\r\\n1. Adding an item to a hash.\\r\\n
\\r\\nstruct hash_entry {\\r\\n int id; /* we'll use this field as the key */\\r\\n char name[10];\\r\\n UT_hash_handle hh; /* makes this structure hashable */\\r\\n};\\r\\n\\r\\nstruct hash_entry *users = NULL;\\r\\n\\r\\nvoid add_user(struct hash_entry *s) {\\r\\n HASH_ADD_INT(users, id, s);\\r\\n}\\r\\n\\r\\n\\r\\n\\r\\n2. Looking up an item in a hash:\\r\\n
\\r\\nstruct hash_entry *find_user(int user_id) {\\r\\n struct hash_entry *s;\\r\\n HASH_FIND_INT(users, &user_id, s);\\r\\n return s;\\r\\n}\\r\\n\\r\\n\\r\\n\\r\\n3. Deleting an item in a hash:\\r\\n
\\r\\nvoid delete_user(struct hash_entry *user) {\\r\\n HASH_DEL(users, user); \\r\\n}\\r\\n\\r\\n\"], \"csharp\": [\"C#\", \"\"], \"javascript\": [\"JavaScript\", \"Node.js 16.13.2.
Your code is run with --harmony flag, enabling new ES6 features.
lodash.js library is included by default.
\\r\\n\\r\\nFor Priority Queue / Queue data structures, you may use 5.3.0 version of datastructures-js/priority-queue and 4.2.1 version of datastructures-js/queue.
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Some common data structure implementations are provided in the Algorithms module: https://www.rubydoc.info/github/kanwei/algorithms/Algorithms
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Go 1.21
Support https://godoc.org/github.com/emirpasic/gods@v1.18.1 library.
\"], \"python3\": [\"Python3\", \"Python 3.10.
Most libraries are already imported automatically for your convenience, such as array, bisect, collections. If you need more libraries, you can import it yourself.
\\r\\n\\r\\nFor Map/TreeMap data structure, you may use sortedcontainers library.
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\\r\\n\\r\\nYour code will be run directly without compiling
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