class Input_kyopro:
    def II(self): return int(input())
    def MI(self): return map(int,input().split())
    def MS(self): return map(str,input().split())
    def LMI(self): return list(self.MI())
    def LMS(self): return list(self.MS())
    def LLI(self,N): return [self.LMI() for _ in range(N)]
    def LLS(self,N): return [self.LMS() for _ in range(N)]
    def LS(self,N): return [input() for _ in range(N)]
    def LSL(self,N): return [list(input()) for _ in range(N)]
    def LI(self,N): return [self.II() for _ in range(N)]
I=Input_kyopro()
#入力
N,M,Q=I.MI()
A=I.LMI()
lr=I.LLI(Q)
Mod=998244353
for i in range(N):
    A[i]=(A[i]-1)*pow(M,N-1-i,Mod)
    A[i]%=Mod
for i in range(1,N):
    A[i]+=A[i-1]
A=[0]+A
for l,r in lr:
    ans=(A[r]-A[l-1])*pow(M,-(N-r),Mod)
    ans+=1
    ans%=Mod
    print(ans)