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A9659 | $Function$

时间限制1s

内存限制256MB

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题目描述

Serega and Fedor play with functions. One day they came across a very interesting function. It looks like that: - $f(1,j)=a[j]$ , $1<=j<=n$ . - $f(i,j)=min(f(i-1,j),f(i-1,j-1))+a[j]$ , $2<=i<=n$ , $i<=j<=n$ . Here $a$ is an integer array of length $n$ . Serega and Fedya want to know what values this function takes at some points. But they don't want to calculate the values manually. So they ask you to help them.

输入格式

The first line contains integer $n$ ( $1<=n<=10^{5}$ ) — the length of array $a$ . The next line contains $n$ integers: $a[1],a[2],...,a[n]$ ( $0<=a[i]<=10^{4}$ ). The next line contains integer $m$ $(1<=m<=10^{5})$ — the number of queries. Each of the next $m$ lines contains two integers: $x_{i}$ , $y_{i}$ ( $1<=x_{i}<=y_{i}<=n$ ). Each line means that Fedor and Serega want to know the value of $f(x_{i},y_{i})$ .

输出格式

Print $m$ lines — the answers to the guys' queries.

输入输出样例

输入 #1

6
2 2 3 4 3 4
4
4 5
3 4
3 4
2 3

输出 #1

输入 #2

7
1 3 2 3 4 0 2
4
4 5
2 3
1 4
4 6

输出 #2

C++ 编辑器

输入

输出