#include<iostream> using namespace std; int main() { int m,n,a[1005]; cin>>m>>n; for(int i=1;i<=m;i++) { cin>>a[i]; } for(int i=1;i<=n;i++) { int x,y; cin>>x>>y; int sum=0; for(int j=x;j<=y;j++) { sum+=a[j]; } cout<<sum<<endl; } return 0; }

//一、字符串拼接:+ 回放：链接：https://share.weiyun.com/mDRF4HnT 密码：zypyn3

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 字符串基础 定义：string str3 = "World"; ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 字符串遍历 1. 下标访问（类似数组） 回放链接：https://share.weiyun.com/XSd90XRz 密码：ithjy4

字符类型 1. char类型 * 用于存储单个字符（1字节，范围-128127或0255） * 声明：char c = 'A'; 2. ASCII值转换 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ ASCII基础 常用ASCII范围： 十进制范围 字符类型 0-31 控制字符（如换行\n） 32 空格 48-57 数字0-9 65-90 大写字母A-Z 97-122 小写字母a-z 特殊字符示例： 字符 ASCII十进制 说明 \0 0 空字符 \n 10 换行 \t 9 制表符 ' ' 32 空格 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 字符操作 1. 输入输出 2. 字符运算 课堂回放：链接：https://share.weiyun.com/0lEz4KVz 密码：v3jfex

6

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name:Artzy14855. 感染：10级。 一个方块：#147。 我的：帽子：恐龙帽子，蜜蜂帽子。 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 内容要重置了， 留下存档。

点我 人数：364 本团有至高无上的AC君！ 官网

fuun.fun fuun.fun

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 字符串基础 定义：string str3 = "World"; ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 字符串遍历 1. 下标访问（类似数组）

点我 人数：364 本团有至高无上的AC君！ 官网

点我 人数：364 本团有至高无上的AC君！ 官网

点我 人数：364 本团有至高无上的AC君！ 官网

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第30次打卡 结果：WA

** * 距离最多为 D 的点指的是小于等于D的点 * 体会一下long long的美妙