N, Q = map(int, input().split())
A = list(map(int, input().split()))
s = [0]
for i in range(N):
	s.append(s[-1] + A[i])
one = []
for i in range(N):
	if A[i] == 1:
		one.append(i)
for _ in range(Q):
	l, r = map(int, input().split())
	l -= 1
	r -= 1
	ans = 0
	for i in one:
		if l <= i <= r:
			ans += r - i
	ans += (s[r + 1] - s[l]) // 9
	print(ans)