# coding: utf-8
M=998244353
N,Q=map(int,input().split())
S=list(input())
for q in range(Q):
    query=[int(_)for _ in input().split()]
    if query[0]==1:
        i=query[1]-1
        if S[i]=='0':
            S[i]='1'
        elif S[i]=='1':
            S[i]='0'
    elif query[0]==2:
        L=query[1]-1
        R=query[2]-1
        A=0
        for l in range(L,R):
            for r in range(l+2,R+2):
                A+=S[l:r].count('0')*S[l:r].count('1')
                A%=M
        print(A)