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Milking CowsThree farmers rise at 5 am each morning and head for the barn to milk three cows. The first farmer begins milking his cow at time 300 (measured in seconds after 5 am) and ends at time 10...

Description你需要维护 N 个整数组成的序列，支持 Q 次询问，每次询问区间 [l,r] 的数字之和是多少.Input第一行两个整数 N，Q.接下来一行 N 个数字，表示序列的初始值是多少.接下来 Q 行，每行两个整数 l , r.Output输出 Q 行，每行一个整数，代表对应区间的元素之和.Sample Input5 21 2 3 4 51 3...

题目描述FJ's N (1 ≤ N ≤ 10,000) cows conveniently indexed 1..N are standing in a line. Each cow has a positive integer height (which is a bit of secret). You are told only the height H (1 ≤ H ≤ 1,000,00...