前缀和
1.一维的795. 前缀和 - AcWing题库 前缀和公式 s[i] a[1] a[2] a[3] ... a[i] 即 s[i] s[i-1] a[i] #include<iostream>
using namespace std;const int N 1e5 10;
int a[N], s[N];int main(){int m, n;cin >> n >> m;for(int i 1; i <…
1,查询所有
mysql> select * from grade;2,
mysql> select id,firstname,lastname from grade;3,
mysql> select firstname,lastname from grade where id > 4;4,
mysql> select * from grade where sex f;5&…
《Programming from the Ground Up》学习第2天,p19-p48总结,总计30页。
一、技术总结
1.object file
p20, An object file is code that is in the machine’s language, but has not been completely put together。
之前在很多地方都看到object fi…