n = int(input())
ls = [0]+ list(map(int, input().split()))
sumls = [0]*(n+1)
for i in range(1,n+1):
    sumls[i] = sumls[i-1]+ls[i]

k = int(input())
for i in range(k):
    l,r = map(int, input().split())
    print(sumls[r]-sumls[l-1])