#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

mint op(mint a, mint b){
    return a + b;
}

mint e(){
    return 0;
}

int main()
{
    int n, m, q;
    cin >> n >> m >> q;
    vector<int> a(n);
    rep(i,n) cin >> a[i];
    segtree<mint, op, e> seg(n);
    rep(i,n){
        seg.set(i, (a[i]-1)*mint(m).pow(n-i-1));
        dbg((a[i]-1)*mint(m).pow(n-i-1).val());
    }
    rep(_,q){
        int l, r;
        cin >> l >> r;
        --l;;
        mint val = seg.prod(l,r);
        val *= mint(m).pow(n-r).inv();
        val += 1;
        cout << val.val() << endl;
    }
    return 0;
}