Problem2420--LevelGround

2420: LevelGround

[Creator : ]
Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 8Submit Num: 12Statistics

Description



Sample Input Copy 

7
3 2 1 2 2 2 1

Sample Output Copy 

6

HINT

Source/Category

AIO 一维数组 
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