201712-1（Python实现）

import math
n = int(input())
rawData = list( map(int, input().split()) )
#print(rawData)
rawData.sort()
#print(rawData)
reList = []
for i in range(0, len(rawData)-1):
    reList.append(math.fabs( rawData[i] - rawData[i+1] ))
print(int(min(reList)))