MOD = 998244353
N, M, Q = map(int, input().split())
A = list(map(int, input().split()))
B = [0] * (N + 1)
R = [0] * (N + 1)
R[0] = 1
RM = pow(M, -1, MOD)
for i in range(1, N):
    R[i] = (R[i - 1] * RM) % MOD
tmp = 1
for i in reversed(range(N)):
    B[i] = ((A[i] - 1) * tmp + B[i + 1]) % MOD
    tmp *= M
    tmp %= MOD
for _ in range(Q):
    l, r = map(int, input().split())
    tmp = B[l - 1] - B[r]
    tmp *= R[N - r]
    tmp += 1
    tmp %= MOD
    print(tmp)