rt

n=int(input())
s=input().split()
qz=0
qzl=[]
for i in range(0,n):
    qz+=int(s[i])
    qzl.append(qz)
m=int(input())
for i in range(0,m):
    l,r=input().split()
    l=int(l)
    r=int(r)
    print(qzl[r-1]-qzl[l-2])