# oj t -c "python3 main.py"
import sys,math
from collections import defaultdict,deque
from itertools import combinations,permutations,accumulate,product
from bisect import bisect_left,bisect_right
from heapq import heappop,heappush,heapify
#from more_itertools import distinct_permutations,distinct_combinations
#from sortedcontainers import SortedList,SortedSet
def input():return sys.stdin.readline().rstrip()
def ii(): return int(input())
def ms(): return map(int, input().split())
def li(): return list(map(int,input().split()))
inf = pow(10,18)
mod = 998244353
#/////////////////////////////////
# 切り上げ除算
def celiDiv(p : int, q : int) -> int:
  return (p + q -1) // q
N,S,B = ms()
H = li()
tmp = H[0]
now = S
for i in range(N-1):
  if tmp-H[i]<S-now:
    tmp = H[i]; now = S
  if tmp<H[i+1]:
    if now<celiDiv(H[i+1]-tmp,B):
      print('No')
      exit()
    aa = celiDiv(H[i+1]-tmp,B)
    tmp += B*aa
    now -= aa
print('Yes')