How to Solve Apply Discount to Prices Problem
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Apply Discount to Prices
A sentence is a string of single-space separated words where each word can contain digits, lowercase letters, and the dollar sign '$'. A word represents a price if it is a sequence of digits preceded ...
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Understanding the Apply Discount to Prices Problem
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Problem Statement
A sentence is a string of single-space separated words where each word can contain digits, lowercase letters, and the dollar sign '$'. 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.
Apply Discount to Prices
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Examples
sentence = "there are $1 $2 and 5$ candies in the shop", discount = 50"there are $0.50 $1.00 and 5$ candies in the shop"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".
sentence = "1 2 $3 4 $5 $6 7 8$ $9 $10$", discount = 100"1 2 $0.00 4 $0.00 $0.00 7 8$ $0.00 $10$"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 "$0.00".
Constraints
1 <= sentence.length <= 105sentence consists of lowercase English letters, digits, ' ', and '$'.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 <= 100How Interview Coder Helps with Leetcode Problems
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