Alice has n
balloons arranged on a rope. You are given a 0indexed string colors
where colors[i]
is the color of the
Alice wants the rope to be colorful. She does not want two consecutive balloons to be of the same color, so she asks Bob for help. Bob can remove some balloons from the rope to make it colorful. You are given a 0indexed integer array neededTime
where neededTime[i]
is the time (in seconds) that Bob needs to remove the
Return the minimum time Bob needs to make the rope colorful.
Example 1:
B R B B G
B R B G
Input: colors = "abaac", neededTime = [1,2,3,4,5]
Output: 3
Explanation: In the above image, 'a' is blue, 'b' is red, and 'c' is green.
Bob can remove the blue balloon at index 2. This takes 3 seconds.
There are no longer two consecutive balloons of the same color. Total time = 3.
Example 2:
B R G
B R G
Input: colors = "abc", neededTime = [1,2,3]
Output: 0
Explanation: The rope is already colorful.
Bob does not need to remove any balloons from the rope.
Example 3:
B B R B B
B R B
Input: colors = "aabaa", neededTime = [1,2,3,4,1]
Output: 2
Explanation: Bob will remove the ballons at indices 0 and 4.
Each ballon takes 1 second to remove.
There are no longer two consecutive balloons of the same color.
Total time = 1 + 1 = 2.
Constraints:
n == colors.length == neededTime.length
1 <= n <= 10^{5}
1 <= neededTime[i] <= 10^{4}
colors
contains only lowercase English letters.

