[HackerRank][Python3] Minimum Loss

Problem :

https://www.hackerrank.com/challenges/minimum-loss/problem

My Solution :

#!/usr/bin/env python3

def minimumLoss(n, price):
    ret = 10**16
    a = [(price[i], i) for i in range(n)]
    a = sorted(a, reverse=True)
    for i in range(n-1):
        if a[i][0] - a[i+1][0] < ret and a[i][1] < a[i+1][1]:
            ret = a[i][0] - a[i+1][0]
    return ret


n = int(input())
price = list(map(int, input().strip().split()))
result = minimumLoss(n, price)
print(result)