#!/bin/python3

import sys


n,a,b,q = input().strip().split(' ')
n,a,b,q = [int(n),int(a),int(b),int(q)]
c = list(map(int, input().strip().split(' ')))
ln=len(c)
for a0 in range(q):
    queryType,first,second = input().strip().split(' ')
    queryType,first,second = [int(queryType),int(first),int(second)]
    # your code goes here
    if queryType==1:
        c[first]=second
    if queryType==2:
        r=0
        for i in range(ln-1):
            r=c[ln-1-i-1]-((c[ln-1-i]/(a-r))*b)
        if r%1==0:
            print('Yes')
        else:
            print('No')