ccf刷题python代码,显示运行错误,未初始化警告
n,k=map(int,input().split())
a=[0 for _ in range(n)]
a[0]=1
cnt=0
for i in range(k):
x,y=map(int,input().split())
if a[y]==0:
cnt+=1
a[x]+=1
print(cnt)
ccf刷题python代码,显示运行错误,未初始化警告
n,k=map(int,input().split())
a=[0 for _ in range(n)]
a[0]=1
cnt=0
for i in range(k):
x,y=map(int,input().split())
if a[y]==0:
cnt+=1
a[x]+=1
print(cnt)