原因：特判两个值为0的区间合并
by Zzzcr @ 2023-05-07 15:56:10
还有，如果ans在区间DP循环内取最值也会WA掉，需要在len只有1的情况下也取一遍max，不然也会WA
by BIOS @ 2023-05-12 23:13:01
thx,终于过了
by hash_peas @ 2023-08-07 10:55:30
thx
by GY程袁浩 @ 2023-08-18 08:03:01
thx
by iqwl @ 2023-10-25 15:26:35
thx
by sort_12470 @ 2024-02-19 16:39:12