@[xx1029](/user/282973)
每行末尾要加上这句话
res[i][i + 1] = res[i][i]
不然前缀和只算了一行
by danefishhh @ 2019-11-08 10:42:18
楼上说得对
by 铁锤 @ 2019-11-08 10:47:51
@[danefishhh](/user/54673)
谢谢大佬指点，A掉了(￣▽￣)~*
by keep_real @ 2019-11-08 10:48:39