568 B | 568 chars
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())
def solve():
while 1:
n, d = mii()
if n == d == 0:
break
l = [mii() for _ in range(d)]
for i in range(1, d):
for j in range(n):
l[0][j] &= l[i][j]
print("yes" if sum(l[0]) > 0 else "no")
if __name__ == "__main__":
tc = 1
for t in range(tc):
solve()