N, Q = map(int, input().split())
S = list(map(int, input().split()))

T = [0] * (N + 1)
for i in range(N):
	T[i + 1] = T[i] + S[i]

for _ in range(Q):
	L, R, K = map(int, input().split())
	print(T[R] - T[L - 1])