import sys
from math import sqrt, pi, sin, factorial
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = " " : [*map(int,inp().split(x))]
mfi = lambda x = " " : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
k = ii()
n = ii()
l = mii()
s= sum(l)
for i in l:
if s - i >= k:
p("YES")
return
p("NO")
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
d = solve()