Problem E: noip2014 珠心算测验

Problem E: noip2014 珠心算测验

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 30  Solved: 14
[Status] [Submit] [Creator:]

Description

Sample Input Copy 

4
1 2 3 4

Sample Output Copy 

2
[Submit][Status]