#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
using namespace std;
using ll = long long;
#include<atcoder/modint>
using namespace atcoder;
using mint = modint998244353;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int n,m,q;
    cin >> n >> m >> q;
    vector<mint> a(n);
    rep(i,n) {
        int x;
        cin >> x;
        a[i] = mint(x-1);
    }
    vector<mint> b(n,1);

    rep(i,n-1) b[i+1] = b[i]*m;

    rep(i,n){
        a[i]/=b[i];
    }
    vector<mint> sum(n+1,0);
    rep(i,n) sum[i+1] = sum[i]+a[i];

    rep(_,q){
        int l,r;
        cin >> l >> r;
        l--;
        int k = r-l;
        mint ans = (sum[r]-sum[l])*(b[l+k-1])+1;
        cout << ans.val() << endl;
    }

    
}