![\"\"](\"https://assets.leetcode.com/uploads/2021/09/17/student_solving_math.png\")
You are given a string s that contains digits 0-9, addition symbols '+', and multiplication symbols '*' only, representing a valid math expression of single digit numbers (e.g., 3+5*2). This expression was given to n elementary school students. The students were instructed to get the answer of the expression by following this order of operations:
You are given an integer array answers of length n, which are the submitted answers of the students in no particular order. You are asked to grade the answers, by following these rules:
5 points;2 points;0 points.Return the sum of the points of the students.
\n\n\n
Example 1:
\n\n\nInput: s = "7+3*1*2", answers = [20,13,42]\nOutput: 7\nExplanation: As illustrated above, the correct answer of the expression is 13, therefore one student is rewarded 5 points: [20,13,42]\nA student might have applied the operators in this wrong order: ((7+3)*1)*2 = 20. Therefore one student is rewarded 2 points: [20,13,42]\nThe points for the students are: [2,5,0]. The sum of the points is 2+5+0=7.\n\n\n
Example 2:
\n\n\nInput: s = "3+5*2", answers = [13,0,10,13,13,16,16]\nOutput: 19\nExplanation: The correct answer of the expression is 13, therefore three students are rewarded 5 points each: [13,0,10,13,13,16,16]\nA student might have applied the operators in this wrong order: ((3+5)*2 = 16. Therefore two students are rewarded 2 points: [13,0,10,13,13,16,16]\nThe points for the students are: [5,0,0,5,5,2,2]. The sum of the points is 5+0+0+5+5+2+2=19.\n\n\n
Example 3:
\n\n\nInput: s = "6+0*1", answers = [12,9,6,4,8,6]\nOutput: 10\nExplanation: The correct answer of the expression is 6.\nIf a student had incorrectly done (6+0)*1, the answer would also be 6.\nBy the rules of grading, the students will still be rewarded 5 points (as they got the correct answer), not 2 points.\nThe points for the students are: [0,0,5,0,0,5]. The sum of the points is 10.\n\n\n
\n
Constraints:
\n\n3 <= s.length <= 31s represents a valid expression that contains only digits 0-9, '+', and '*' only.[0, 9].1 <= The count of all operators ('+' and '*') in the math expression <= 15[0, 1000].n == answers.length1 <= n <= 1040 <= answers[i] <= 1000给你一个字符串 s ，它 只 包含数字 0-9 ，加法运算符 '+' 和乘法运算符 '*' ，这个字符串表示一个 合法 的只含有 个位数数字 的数学表达式（比方说 3+5*2）。有 n 位小学生将计算这个数学表达式，并遵循如下 运算顺序 ：
给你一个长度为 n 的整数数组 answers ，表示每位学生提交的答案。你的任务是给 answer 数组按照如下 规则 打分：
5 分。2 分。0 分。请你返回所有学生的分数和。
\n\n\n\n
示例 1：
\n\n
输入：s = \"7+3*1*2\", answers = [20,13,42]\n输出：7\n解释：如上图所示，正确答案为 13 ，因此有一位学生得分为 5 分：[20,13,42] 。\n一位学生可能通过错误的运算顺序得到结果 20 ：7+3=10，10*1=10，10*2=20 。所以这位学生得分为 2 分：[20,13,42] 。\n所有学生得分分别为：[2,5,0] 。所有得分之和为 2+5+0=7 。\n\n\n
示例 2：
\n\n输入：s = \"3+5*2\", answers = [13,0,10,13,13,16,16]\n输出：19\n解释：表达式的正确结果为 13 ，所以有 3 位学生得到 5 分：[13,0,10,13,13,16,16] 。\n学生可能通过错误的运算顺序得到结果 16 ：3+5=8，8*2=16 。所以两位学生得到 2 分：[13,0,10,13,13,16,16] 。\n所有学生得分分别为：[5,0,0,5,5,2,2] 。所有得分之和为 5+0+0+5+5+2+2=19 。\n\n\n
示例 3：
\n\n输入：s = \"6+0*1\", answers = [12,9,6,4,8,6]\n输出：10\n解释：表达式的正确结果为 6 。\n如果一位学生通过错误的运算顺序计算该表达式，结果仍为 6 。\n根据打分规则，运算顺序错误的学生也将得到 5 分（因为他们仍然得到了正确的结果），而不是 2 分。\n所有学生得分分别为：[0,0,5,0,0,5] 。所有得分之和为 10 分。\n\n\n
\n\n
提示：
\n\n3 <= s.length <= 31s 表示一个只包含 0-9 ，'+' 和 '*' 的合法表达式。[0, 9] 以内。1 <= 数学表达式中所有运算符数目（'+' 和 '*'） <= 15[0, 1000] 以内。n == answers.length1 <= n <= 1040 <= answers[i] <= 1000\\u7248\\u672c\\uff1a \\u7f16\\u8bd1\\u65f6\\uff0c\\u5c06\\u4f1a\\u91c7\\u7528 \\u4e3a\\u4e86\\u4f7f\\u7528\\u65b9\\u4fbf\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8\\u5bfc\\u5165\\u3002<\\/p>\"],\"java\":[\"Java\",\" \\u7248\\u672c\\uff1a \\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u88ab\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n \\u5305\\u542b Pair \\u7c7b: https:\\/\\/docs.oracle.com\\/javase\\/8\\/javafx\\/api\\/javafx\\/util\\/Pair.html <\\/p>\"],\"python\":[\"Python\",\" \\u7248\\u672c\\uff1a \\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u5e38\\u7528\\u5e93\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8 \\u5bfc\\u5165\\uff0c\\u5982\\uff1aarray<\\/a>, bisect<\\/a>, collections<\\/a>\\u3002\\u5982\\u679c\\u60a8\\u9700\\u8981\\u4f7f\\u7528\\u5176\\u4ed6\\u5e93\\u51fd\\u6570\\uff0c\\u8bf7\\u81ea\\u884c\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n \\u6ce8\\u610f Python 2.7 \\u5c06\\u57282020\\u5e74\\u540e\\u4e0d\\u518d\\u7ef4\\u62a4<\\/a>\\u3002 \\u5982\\u60f3\\u4f7f\\u7528\\u6700\\u65b0\\u7248\\u7684Python\\uff0c\\u8bf7\\u9009\\u62e9Python 3\\u3002<\\/p>\"],\"c\":[\"C\",\" \\u7248\\u672c\\uff1a \\u7f16\\u8bd1\\u65f6\\uff0c\\u5c06\\u4f1a\\u91c7\\u7528 \\u4e3a\\u4e86\\u4f7f\\u7528\\u65b9\\u4fbf\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n \\u5982\\u60f3\\u4f7f\\u7528\\u54c8\\u5e0c\\u8868\\u8fd0\\u7b97, \\u60a8\\u53ef\\u4ee5\\u4f7f\\u7528 uthash<\\/a>\\u3002 \\\"uthash.h\\\"\\u5df2\\u7ecf\\u9ed8\\u8ba4\\u88ab\\u5bfc\\u5165\\u3002\\u8bf7\\u770b\\u5982\\u4e0b\\u793a\\u4f8b:<\\/p>\\r\\n\\r\\n 1. 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