decrease专题

Decrease-and-Conquer

第四章 Decrease-and-Conquer  增量方法:自下而上的变化通常是以迭代方式实现;以问题的一个小地方开始。 The bottom-up variation is usually implemented iteratively, starting with a solution to the smallest instance of

C. Set or Decrease---二分+贪心

题目链接 #include <iostream>#include <cstring>#include <algorithm>#include <bitset>#include <map>using namespace std;#define int long longconst int N = 200010;typedef pair<int,int>PII;int a[N]

ORA-01440: column to be modified must be empty to decrease precision or scale

在修改表字段的NUMBER类型的精度或刻度时,你可能会遇到ORA-01440: column to be modified must be empty to decrease precision or scale,下面介绍一下,如何处理这个问题。测试案例如下:   SQL> drop table test;       Table dropped.       SQL>create tabl