#2288
Apply Discount to Prices
expert · 1145 · lc medium +32 · verified · 33.8% accepted · 223 likes · top 11%
Description
A sentence is a string of single-space-separated words, each of which may contain digits, lowercase letters, and the dollar sign '$'. A word is a price when it starts with '$' and the rest consists entirely of digits.
- For instance, "$100", "$23", and "$6" are valid prices, while "100", "$", and "$1e5" are not.
Given a string sentence and an integer discount, reduce every price by discount% and express the result with exactly two decimal places.
Return the updated sentence.
Note: all prices have 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".
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