Package g2201_2300.s2288_apply_discount_to_prices

Class Solution

java.lang.Object
g2201_2300.s2288_apply_discount_to_prices.Solution
public class Solution extends java.lang.Object
2288 - Apply Discount to Prices.

Medium

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

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.lang.String
    discountPrices(java.lang.String sentence, int discount)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • discountPrices

      public java.lang.String discountPrices(java.lang.String sentence, int discount)