N, M, Q = map(int, input().split())
A = list(map(int, input().split()))
LR = [list(map(int, input().split())) for _ in range(Q)]

MOD = 998244353

B = []
for i in range(N):
    B.append(A[i]-1)

POW = [1]
POW_inv = [1]
for _ in range(N):
    POW.append(POW[-1]*M%MOD)
    POW_inv.append(pow(POW[-1], -1, MOD))

for i in reversed(range(N)):
    B[i] *= POW[N-1-i]
    B[i] %= MOD
cum = [0]
for i in range(N):
    cum.append((cum[-1]+B[i])%MOD)

for L, R in LR:
    L -= 1
    q = (cum[R]-cum[L])%MOD
    ans = q*POW_inv[N-R]%MOD
    print((ans+1)%MOD)