Burst Balloons

IF
AlgoAxiomStaff Engineers
JSTS
Hard20 mins

You are given n balloons, indexed from 0 to n - 1. Each balloon is painted with a number on it represented by an array nums. You are asked to burst all the balloons.

If you burst the ith balloon, you will get nums[i - 1] * nums[i] * nums[i + 1] coins. If i - 1 or i + 1 goes out of bounds of the array, then treat it as if there is a balloon with a 1 painted on it.

Return the maximum coins you can collect by bursting the balloons wisely.

Examples

Example 1:

Input: nums = [3,1,5,8]

Output: 167

Explanation:

nums = [3,1,5,8] --> [3,5,8] --> [3,8] --> [8] --> []

coins = 3*1*5 + 3*5*8 + 1*3*8 + 1*8*1 = 15 + 120 + 24 + 8 = 167

Example 2:

Input: nums = [1,5]

Output: 10

Explanation: Burst balloon 0 first for 1*1*5 = 5, then burst balloon 1 for 1*5*1 = 5. Total = 10.

Constraints

  • 1 <= nums.length <= 300
  • 0 <= nums[i] <= 100
Source: Dynamic Programming pattern — AlgoAxiom
JavaScript
Test Case 1
root = [1, 2, 3]
Test Case 2
root = [1, 2, 3, 4, 5]
Idle