#include <bits/stdc++.h>
#include <atcoder/all>
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 P pair<int,int>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
template <typename T, int X = 1>
struct Matrix {
	array<array<T, X>, X> v;
	Matrix(int i = 0) {
		if (1 == i) { for (int i = 0; i < X; ++i) { v[i][i] = 1; } }
	}
	std::array<T, X>& operator[](const int i) {
		return v[i];
	}
	Matrix(const array<array<T, X>, X> &s) { v = s; }
	Matrix operator*=(const Matrix & m) {
		Matrix s(0);
		for (int i = 0; i < X; ++i) {
			for (int j = 0; j < X; ++j) {
				for (int k = 0; k < X; ++k) {
					s.v[i][j] += m.v[i][k] * v[k][j];
				}
			}
		}
		swap(s, *this);
		return *this;
	}
};
Matrix<mint, 3> op(Matrix<mint, 3> a, Matrix<mint, 3> b) {
	Matrix<mint, 3> ret(0);
	for (int i = 0; i < 3; ++i) {
		for (int j = 0; j < 3; ++j) {
			for (int k = 0; k < 3; ++k) {
				ret.v[i][j] += b.v[i][k] * a.v[k][j];
			}
		}
	}
	return ret;
}
Matrix<mint, 3> e() {
	return Matrix<mint, 3>(1);
}
int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	auto unit = Matrix<mint, 3>();
	unit[0] = { 1, 0, 0 };
	unit[1] = { 0, 1, 0 };
	unit[2] = { 0, 0, 1 };
	auto zero = Matrix<mint, 3>();
	zero[0] = { 1, 1, 0 };
	zero[1] = { 0, 1, 0 };
	zero[2] = { 0, 0, 1 };
	auto one = Matrix<mint, 3>();
	one[0] = { 1, 0, 0 };
	one[1] = { 1, 1, 1 };
	one[2] = { 0, 0, 1 };
	int n, q; cin >> n >> q;
	string s; cin >> s;
	vector<Matrix<mint, 3>>init(n);
	rep(i, n) {
		if ('0' == s[i])init[i] = zero;
		else init[i] = one;
	}
	segtree<Matrix<mint, 3>, op, e>seg(init);
	set<int>st;
	rep(i, n)st.insert(i);
	while (q--) {
		int t, l, r; cin >> t >> l >> r;
		l--;
		if (1 == t) {
			auto ite = st.lower_bound(l);
			while (ite != st.end() && *ite < r) {
				seg.set(*ite, unit);
				ite = st.erase(ite);
			}
		}
		else {
			auto get = seg.prod(l, r);
			mint ans = get[0][2] + get[1][2];
			cout << ans.val() << endl;
		}
	}
	return 0;
}