n,a,b,q = raw_input().strip().split(' ')
n,a,b,q = [int(n),int(a),int(b),int(q)]
k = -b/a
c = map(int, raw_input().strip().split(' '))
for x in range(q):
    qT,l,r = raw_input().strip().split(' ')
    qT,l,r = [int(qT),int(l),int(r)]
    # your code goes here
    if qT == 1:
        c[l] = r
    if qT == 2:
    	s = 0
    	for i in range(l,r+1):
    		s = s + (k**(i-l))*c[i]
    	if s>0:
    		print 'No'
    	else:
    		print 'Yes'