1184.py

'''
A bus has n stops numbered from 0 to n - 1 that form a circle. We know the distance between all pairs of neighboring stops where distance[i] is the distance between the stops number i and (i + 1) % n.

The bus goes along both directions i.e. clockwise and counterclockwise.

Return the shortest distance between the given start and destination stops.

 

Example 1:
Input: distance = [1,2,3,4], start = 0, destination = 1
Output: 1
Explanation: Distance between 0 and 1 is 1 or 9, minimum is 1.
 

Example 2:
Input: distance = [1,2,3,4], start = 0, destination = 2
Output: 3
Explanation: Distance between 0 and 2 is 3 or 7, minimum is 3.
 

Example 3:
Input: distance = [1,2,3,4], start = 0, destination = 3
Output: 4
Explanation: Distance between 0 and 3 is 6 or 4, minimum is 4.
 

Constraints:

1 <= n <= 10^4
distance.length == n
0 <= start, destination < n
0 <= distance[i] <= 10^4
'''

class Solution(object):
    def distanceBetweenBusStops(self, distance, start, destination):
        """
        :type distance: List[int]
        :type start: int
        :type destination: int
        :rtype: int
        """
        start, destination = min(start, destination), max(start, destination)
        clock_dist = sum(distance[start:destination])
        anti_clock_dist = sum(distance[:start]) + sum(distance[destination:])
        return min(clock_dist, anti_clock_dist)