#28658: MemoryError 想了好久,找不到原因
import sys
for s in sys.stdin:
if s.strip() == '': continue
n,m = map(int,s.split())
v = [0 for i in range(n + 1)]
for i in range(m):
a,b = map(int,sys.stdin.readline().split())
v[a] += 1;v[b] += 1
ans = sum([1 for i in range(n + 1) if v[i] % 2 == 1])
if ans == 0 or ans == 2:print('YES')
else: print('NO')
print('\r')
其它的測資AC
但以下測資出現
MemoryError
測資 # 4, #5
a,b = map(int,sys.stdin.readline().split())
MemoryError
測資#6
for s in sys.stdin:
MemoryError
請教大家~~感恩~~
#28659: Re:MemoryError 想了好久,找不到原因