import strutils, sequtils, deques

type stdinReader = object
    buf: Deque[string]

func newStdinReader(): stdinReader =
    result = stdinReader(buf: initDeque[string]())

proc readString(sr: var stdinReader): string =
    if sr.buf.len == 0:
        sr.buf = stdin.readLine.split.toDeque
    sr.buf.popFirst

proc readInt(sr: var stdinReader): int =
    readString(sr).parseInt

var reader = newStdinReader()
let (n, q) = (reader.readInt, reader.readInt)
let s = reader.readString
var sSeq = s.mapIt(int(it) - int('0'))

const MOD = 998244353

if n > 10000:
    quit(0)

for _ in 0..<q:
    let t = reader.readInt
    if t == 1:
        let i = reader.readInt - 1
        sSeq[i] = 1 - sSeq[i]
    else:
        let (l, r) = (reader.readInt - 1, reader.readInt - 1)
        
        var
            count = 1
            a = 0
            b = 0
            x = 0
            ans = 0
        for i in sSeq[l..r]:
            if i == 0:
                a += count
                if a >= MOD:
                    a = a - MOD
                x += b
                if x >= MOD:
                    x = x - MOD
            else:
                b += count
                if b >= MOD:
                    b = b - MOD
                x += a
                if x >= MOD:
                    x = x - MOD
            count += 1
            ans += x
            if ans >= MOD:
                ans = ans - MOD
        echo ans