A sentence is a string of single-space separated words where each word can contain digits, lowercase letters, and the dollar sign '$'. A word represents a price if it is a sequence of digits preceded by a dollar sign.
"$100", "$23", and "$6" represent prices while "100", "$", and "$1e5" do not.You are given a string sentence representing a sentence and an integer discount. For each word representing a price, apply a discount of discount% on the price and update the word in the sentence. All updated prices should be represented with exactly two decimal places.
Return a string representing the modified sentence.
\n\nNote that all prices will contain at most 10 digits.
\n
Example 1:
\n\n\nInput: sentence = "there are $1 $2 and 5$ candies in the shop", discount = 50\nOutput: "there are $0.50 $1.00 and 5$ candies in the shop"\nExplanation: \nThe words which represent prices are "$1" and "$2". \n- A 50% discount on "$1" yields "$0.50", so "$1" is replaced by "$0.50".\n- A 50% discount on "$2" yields "$1". Since we need to have exactly 2 decimal places after a price, we replace "$2" with "$1.00".\n\n\n
Example 2:
\n\n\nInput: sentence = "1 2 $3 4 $5 $6 7 8$ $9 $10$", discount = 100\nOutput: "1 2 $0.00 4 $0.00 $0.00 7 8$ $0.00 $10$"\nExplanation: \nApplying a 100% discount on any price will result in 0.\nThe words representing prices are "$3", "$5", "$6", and "$9".\nEach of them is replaced by "$0.00".\n\n\n
\n
Constraints:
\n\n1 <= sentence.length <= 105sentence consists of lowercase English letters, digits, ' ', and '$'.sentence does not have leading or trailing spaces.sentence are separated by a single space.10 digits.0 <= discount <= 100句子 是由若干个单词组成的字符串，单词之间用单个空格分隔，其中每个单词可以包含数字、小写字母、和美元符号 '$' 。如果单词的形式为美元符号后跟着一个非负实数，那么这个单词就表示一个价格。
\"$100\"、\"$23\" 和 \"$6.75\" 表示价格，而 \"100\"、\"$\" 和 \"2$3\" 不是。注意：本题输入中的价格均为整数。
\n\n给你一个字符串 sentence 和一个整数 discount 。对于每个表示价格的单词，都在价格的基础上减免 discount% ，并 更新 该单词到句子中。所有更新后的价格应该表示为一个 恰好保留小数点后两位 的数字。
返回表示修改后句子的字符串。
\n\n\n\n
示例 1：
\n\n\n输入：sentence = \"there are $1 $2 and 5$ candies in the shop\", discount = 50\n输出：\"there are $0.50 $1.00 and 5$ candies in the shop\"\n解释：\n表示价格的单词是 \"$1\" 和 \"$2\" 。 \n- \"$1\" 减免 50% 为 \"$0.50\" ，所以 \"$1\" 替换为 \"$0.50\" 。\n- \"$2\" 减免 50% 为 \"$1\" ，所以 \"$1\" 替换为 \"$1.00\" 。\n\n
示例 2：
\n\n\n输入：sentence = \"1 2 $3 4 $5 $6 7 8$ $9 $10$\", discount = 100\n输出：\"1 2 $0.00 4 $0.00 $0.00 7 8$ $0.00 $10$\"\n解释：\n任何价格减免 100% 都会得到 0 。\n表示价格的单词分别是 \"$3\"、\"$5\"、\"$6\" 和 \"$9\"。\n每个单词都替换为 \"$0.00\"。\n\n\n
\n\n
提示：
\n\n1 <= sentence.length <= 105sentence 由小写英文字母、数字、' ' 和 '$' 组成sentence 不含前导和尾随空格sentence 的所有单词都用单个空格分隔10 位数字0 <= discount <= 100\\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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