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])
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