#!/bin/python3

import sys
from fractions import Fraction

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(' ')))

Powers = [Fraction(1,1)]
for i in range(1,n):
    Powers.append(Powers[-1]*Fraction(-b,a))

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
    else:
        if sum([Powers[m]*c[m] for m in range(n)]) == 0:
            print('Yes')
        else:
            print('No')