#include #include using namespace std; using namespace atcoder; //using mint = modint1000000007; //const int mod = 1000000007; using mint = modint998244353; const int mod = 998244353; //const int INF = 1e9; //const long long LINF = 1e18; #define rep(i, n) for (int i = 0; i < (n); ++i) #define rep2(i,l,r)for(int i=(l);i<(r);++i) #define rrep(i, n) for (int i = (n-1); i >= 0; --i) #define rrep2(i,l,r)for(int i=(r-1);i>=(l);--i) #define all(x) (x).begin(),(x).end() #define allR(x) (x).rbegin(),(x).rend() #define endl "\n" #define P pair template inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; } template inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; } vectorpw(300005); struct S { mint val; int sz; S(mint val, int sz) :val(val), sz(sz) {} }; S op(S a, S b) { mint val = a.val * pw[b.sz] + b.val; int sz = a.sz + b.sz; return S(val, sz); } S e() { return S(0, 0); } mint op2(mint a, mint b) { return a + b; } mint e2() { return 0; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int n, m, k, q; cin >> n >> m >> k >> q; pw[0] = 1; rep2(i, 1, pw.size()) pw[i] = m * pw[i - 1]; vectora(n); rep(i, n)cin >> a[i], a[i]--; segtreeseg(n); rep(i, n) seg.set(i, { a[i],1 }); segtreeseg2(n); rep(i, n) seg2.set(i, a[i]); while (q--) { int t; cin >> t; if (1 == t) { int l, r; cin >> l >> r; l--; if (1 == m) { cout << r - l << endl; continue; } mint ans = 0; ans += seg.prod(l, r).val * pow_mod(m, k - (r - l) + 1, mod); ans -= seg2.prod(l, r); ans /= (m - 1); ans += r - l; cout << ans.val() << endl; } else { int x, y; cin >> x >> y; x--, y--; seg.set(x, { y,1 }); seg2.set(x, y); } } return 0; }