from collections import*
n,s,b,*h=map(int,open(0).read().split())
dp={h[0]:s}
for j in h[1:]:
  ndp=defaultdict(int)
  for k,v in dp.items():
    if k>=j:
      ndp[k]=max(ndp[k],v)
      ndp[j]=max(ndp[j],s)
      continue
    nv,nk=v,k
    while nv>0:
      nv-=1
      nk+=b
      if nk>=j:
        ndp[nk]=max(ndp[nk],nv)
        ndp[j]=max(ndp[j],s)
        break
  if not ndp:
    exit(print('No'))
  dp=ndp
print('Yes')