Problem3459--【Div3】标记练习-atcoder417c-DistanceIndicator

3459: 【Div3】标记练习-atcoder417c-DistanceIndicator

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Time Limit : 1.000 sec  Memory Limit : 128 MB

Description


Sample Input Copy

9
3 1 4 1 5 9 2 6 5

Sample Output Copy

3

Source/Category