#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
istream &operator>>(istream &is, modint &a) { long long v; is >> v; a = v; return is; }
ostream &operator<<(ostream &os, const modint &a) { return os << a.val(); }
istream &operator>>(istream &is, modint998244353 &a) { long long v; is >> v; a = v; return is; }
ostream &operator<<(ostream &os, const modint998244353 &a) { return os << a.val(); }
istream &operator>>(istream &is, modint1000000007 &a) { long long v; is >> v; a = v; return is; }
ostream &operator<<(ostream &os, const modint1000000007 &a) { return os << a.val(); } 

typedef long long ll;
typedef vector<vector<int>> Graph;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define FOR(i,l,r) for (int i = l;i < (int)(r); i++)
#define rep(i,n) for (int i = 0;i < (int)(n); i++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define my_sort(x) sort(x.begin(), x.end())
#define my_max(x) *max_element(all(x))
#define my_min(x) *min_element(all(x))
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
const int INF = (1<<30) - 1;
const ll LINF = (1LL<<62) - 1;
const int MOD = 998244353;
const int MOD2 = 1e9+7;
const double PI = acos(-1);
vector<int> di = {1,0,-1,0};
vector<int> dj = {0,1,0,-1};

#ifdef LOCAL
#  include <debug_print.hpp>
#  define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define debug(...) (static_cast<void>(0))
#endif

// https://youtu.be/ylWYSurx10A?t=2352
template<typename T>
struct Matrix{
    int h, w;
    vector<vector<T>> d;
    Matrix() {}
    Matrix(int h, int w, T val=0): h(h), w(w), d(h, vector<T>(w,val)) {}
    Matrix(int n, T val=0): h(n), w(n), d(n, vector<T>(n,val)) {}

    Matrix& unit(){
        assert(h == w);
        rep(i,h) d[i][i] = 1;
        return *this;
    }

    const vector<T>& operator[](int i) const { return d[i];}
    vector<T>& operator[](int i) { return d[i];}

    Matrix operator*(const Matrix& a) const {
        assert(w == a.h);
        Matrix r(h, a.w);
        rep(i,h)rep(k,w)rep(j,a.w){
            r[i][j] += d[i][k] * a[k][j];
        }
        return r;
    }

    Matrix pow(long long t) const {
        assert(h == w);
        if(!t) Matrix(h, h).unit();
        if(t == 1) return *this;
        Matrix r = pow(t >> 1);
        r = r * r;
        if(t & 1) r = r * (*this);
        return r;
    }
};

const int D = 3;
using mint = modint998244353;
using S = Matrix<mint>;
S op(S a, S b){
    return a * b;
}
S e(){
    return S(D).unit();
}

int main(){
    cin.tie(0);
    ios_base::sync_with_stdio(false);
    int N, Q; cin >> N >> Q;
    string T; cin >> T;

    S zero = S(D).unit();
    zero[0][1] = 1;

    S one = S(D).unit();
    one[1][0] = 1;
    one[1][2] = 1;

    S eye = S(D).unit();

    vector<S> dat(N);
    rep(i, N){
        if(T[i] == '0') dat[N - 1 - i] = zero;
        if(T[i] == '1') dat[N - 1 - i] = one;
    }
    segtree<S,op,e> seg(dat);

    set<int> rest;
    rep(i, N) rest.insert(i);

    while(Q--){
        int f, l, r; cin >> f >> l >> r;
        l--;
        if(f == 1){
            auto itr = rest.lower_bound(l);
            while(itr != rest.end() && *itr < r){
                seg.set(N - 1 - *itr, eye);
                itr = rest.erase(itr);
            }
        }
        else{
            S res = seg.prod((N - 1) - r + 1, N - 1 - l + 1);
            cout << res[0][2] + res[1][2] << endl;
        }
    }
}