17. Dam Design Your company is designing a dam to be built across a stream to create a small lake. To reduce materials cost, it will be made of one or more concrete walls with mud packed in between them. Determine the maximum height of the mud segments in the dam with the following restrictions: One unit width of the gap between walls will contain one segment of packed mud The height of mud in a segment cannot exceed 1 unit more than an adjacent wall or mud segment. Given the placement of a number of walls and their heights, determine the maximum height of a mud segment that can be built. If no mud segment can be built, return 0. Example wallPositions [1, 2, 4, 7] wallHeights [4,6,8,11] 7 10 11 Mud segments