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

using mint = atcoder::modint998244353;

int main(){
	int n, q;
	cin >> n >> q;
	string s;
	cin >> s;
	set<int> rest;
	rep(i, n) rest.insert(i);
	rep(i, q){
		int t, l, r;
		cin >> t >> l >> r;
		l--; r--;
		if(t == 1){
			while(true){
				auto it = rest.lower_bound(l);
				if(it == rest.end()) break;
				if(*it > r) break;
				s[*it] = '_';
				rest.erase(it);
			}
		}
		if(t == 2){
			mint f = 0;
			mint g = 0;
			for(int i = l; i <= r; i++){
				if(s[i] == '0') f = f + g;
				if(s[i] == '1') g = f + g + 1;
			}
			cout << (f + g).val() << "\n";
		}
	}
	return 0;
}