select * from (select count(name) as isone, name from tbl_org_departments group by name) t where t.isone > 1; 解释: 子句查出下列结果集作为主句的表, 当isone列为1时说明没有重复, 大于1时说明存在重复 执行子句时结果:
[抄题]: 就是出现了多次的子树,可以只包括一个点. Given a binary tree, return all duplicate subtrees. For each kind of duplicate subtrees, you only need to return the root node of any one of them. Two trees are duplicate if they have the same structure with same node value
int a[] = {1,3}; int b[] = {1,3,5}; int size = a.length>b.length ?a.length:b.length; int valueA =0 ; int valueB =0; for(int i =0;i<size;i++){ int tempA =1; int tempB =1; if(i<a.length){ valueA += tempA << a[i]; valueB += tempB << b[i]