# coding: utf-8
sales= [255, 100, 353, 400]
print len(sales)
print sales[2]
sales[2] = 100
print sales[2]

# 含んでいるか否か
print 100 in sales
print 500 in sales

# range
print range(10)
print range(3,10)
print range(3,10,2)
