#!/bin/python

import sys


n,a,b,q = raw_input().strip().split(' ')
n,a,b,q = [int(n),int(a),int(b),int(q)]
c = map(int, raw_input().strip().split(' '))
for a0 in xrange(q):
    querytype,first,second = raw_input().strip().split(' ')
    querytype,first,second = [int(querytype),int(first),int(second)]
    # your code goes here
    if(querytype==1):
        c[first]=second
    else:
        var=0
        for i in range(first,second+1):
            var=var+c[i]*pow((-b)*1.0/a,i-first)
        if(var%1000000007==0):
            print "Yes"
        else:
            print "No"