#18796. 线段树
线段树
说明
10
3 1 2 9 6 4 5 7 8
3
7 6 7
18 4 5
14 5 6
7
11
3
10
3 1 2 9 6 4 5 7 8
3
7 6 7
18 4 5
14 5 6
7
11
3
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