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 q > 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)
        var cumsum = newSeq[int](r - l + 1)
        cumsum[0] = 0
        for i, x in sSeq[l..<r]:
            cumsum[i + 1] = cumsum[i] + x
        
        var ans = 0
        for i in 0..<cumsum.len:
            for j in i+1..<cumsum.len:
                let len = j - i
                let x = cumsum[j] - cumsum[i]
                ans = (ans + x * (len - x)) mod MOD
        echo ans