g1401_1500.s1449_form_largest_integer_with_digits_that_add_up_to_target

Class Solution

java.lang.Object

g1401_1500.s1449_form_largest_integer_with_digits_that_add_up_to_target.Solution

public class Solution
extends Object

1449 - Form Largest Integer With Digits That Add up to Target.

Hard

Given an array of integers cost and an integer target, return the maximum integer you can paint under the following rules:

• The cost of painting a digit (i + 1) is given by cost[i] ( 0-indexed ).
• The total cost used must be equal to target.
• The integer does not have 0 digits.

Since the answer may be very large, return it as a string. If there is no way to paint any integer given the condition, return "0".

Example 1:

Input: cost = [4,3,2,5,6,7,2,5,5], target = 9

Output: “7772”

Explanation: The cost to paint the digit ‘7’ is 2, and the digit ‘2’ is 3. Then cost(“7772”) = 2*3+ 3*1 = 9. You could also paint “977”, but “7772” is the largest number.

Digit cost

1 -> 4

2 -> 3

3 -> 2

4 -> 5

5 -> 6

6 -> 7

7 -> 2

8 -> 5

9 -> 5

Example 2:

Input: cost = [7,6,5,5,5,6,8,7,8], target = 12

Output: “85”

Explanation: The cost to paint the digit ‘8’ is 7, and the digit ‘5’ is 5. Then cost(“85”) = 7 + 5 = 12.

Example 3:

Input: cost = [2,4,6,2,4,6,4,4,4], target = 5

Output: “0”

Explanation: It is impossible to paint any integer with total cost equal to target.

Constraints:

• cost.length == 9
• 1 <= cost[i], target <= 5000

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
String	largestNumber(int[] cost, int target)

Methods inherited from class java.lang.Object

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

Constructor Detail

Solution

public Solution()

Method Detail

largestNumber

public String largestNumber(int[] cost,
                            int target)