apply-discount-to-prices.json

{
  "id": 2373,
  "name": "apply-discount-to-prices",
  "difficulty": "Medium",
  "link": "https://leetcode.com/problems/apply-discount-to-prices/",
  "date": "2022-05-22",
  "task_description": "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. For example, `\"$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_. Note that all prices will contain **at most** `10` digits. **Example 1:** ``` **Input:** sentence = \"there are $1 $2 and 5$ candies in the shop\", discount = 50 **Output:** \"there are $0.50 $1.00 and 5$ candies in the shop\" **Explanation:** The words which represent prices are \"$1\" and \"$2\". - A 50% discount on \"$1\" yields \"$0.50\", so \"$1\" is replaced by \"$0.50\". - 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\". ``` **Example 2:** ``` **Input:** sentence = \"1 2 $3 4 $5 $6 7 8$ $9 $10$\", discount = 100 **Output:** \"1 2 $0.00 4 $0.00 $0.00 7 8$ $0.00 $10$\" **Explanation:** Applying a 100% discount on any price will result in 0. The words representing prices are \"$3\", \"$5\", \"$6\", and \"$9\". Each of them is replaced by \"$0.00\". ``` **Constraints:** `1 <= sentence.length <= 105` `sentence` consists of lowercase English letters, digits, `' '`, and `'$'`. `sentence` does not have leading or trailing spaces. All words in `sentence` are separated by a single space. All prices will be **positive** numbers without leading zeros. All prices will have **at most** `10` digits. `0 <= discount <= 100`",
  "test_case": [
    {
      "label": "Example 1",
      "input": "sentence = \"there are $1 $2 and 5$ candies in the shop\", discount = 50",
      "output": "\"there are $0.50 $1.00 and 5$ candies in the shop\" "
    },
    {
      "label": "Example 2",
      "input": "sentence = \"1 2 $3 4 $5 $6 7 8$ $9 $10$\", discount = 100",
      "output": "\"1 2 $0.00 4 $0.00 $0.00 7 8$ $0.00 $10$\" "
    }
  ],
  "constraints": [
    "For example, \"$100\", \"$23\", and \"$6\" represent prices while \"100\", \"$\", and \"$1e5\" do not.",
    "1 <= sentence.length <= 105",
    "sentence consists of lowercase English letters, digits, ' ', and '$'.",
    "sentence does not have leading or trailing spaces.",
    "All words in sentence are separated by a single space.",
    "All prices will be positive numbers without leading zeros.",
    "All prices will have at most 10 digits.",
    "0 <= discount <= 100"
  ],
  "python_template": "class Solution(object):\n    def discountPrices(self, sentence, discount):\n        \"\"\"\n        :type sentence: str\n        :type discount: int\n        :rtype: str\n        \"\"\"\n        ",
  "java_template": "class Solution {\n    public String discountPrices(String sentence, int discount) {\n        \n    }\n}",
  "metadata": {
    "func_name": "discountPrices"
  }
}