ECNU Online Judge

#	标题	奖励	解出人数
3392	data structure segment tree 线段树：区间覆盖	4.3	x 43
3391	data structure segment tree 线段树：区间增加	2.9	x 142
3390	data structure segment tree 线段树：点覆盖	3.4	x 60
3389	data structure segment tree 线段树：点增加	3.1	x 119
2918	data structure segment tree K-th Number	5.2	x 23
2458	segment tree Frequent values	3.1	x 129
1467	segment tree Mars Maps	6.5	x 11

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