Interval weighting and

Question Description

The length is N of the series A, and Q query, each time asked a period of weighted and S, the first number, the second number * *, and so on. S=σai* (i-l+1) (l<=i<=r)

Input

First line, an integer n The second line, n number, represents a array, separated by a space. Third line, a positive integer q 4th to Q+3 line two positive integer L, R (L<=r), representing an interval, separated by a space.

Output

For each query, output results. Each result occupies one row.

Input example

5 3 2 4) 3 5 3 1 3 2 5 3 4

Output example

19 39 10

Other Notes

Data size: N, Q, ai<=100000

Ideas See albums

1#include <iostream>2 3 using namespacestd;4 Long Longa[101010],s[101010],w[101010];5 intMain ()6 {7     Long Longn,i;8scanf"%lld",&n);9      for(i=1; i<=n;i++) Ten     { Onescanf"%lld",&a[i]); As[i]=s[i-1]+A[i]; -w[i]=w[i-1]+S[i]; -     } the     Long Longq,x,y,temp; -scanf"%lld",&q); -      for(i=1; i<=q;i++) -     { +scanf"%lld%lld",&x,&y); -Temp= (y-x+1) *s[y]-(w[y-1]-w[x-2]); +printf"%lld\n", temp); A     } at     return 0; -}

interval weighting and

Interval weighting and