You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

5 lines
122 B

def f(d,e,f):
a,b=*map(int,d.split('-'))
return (f[a-1]==e[0])^(f[b-1]==e[0])
print(sum(f(*x.split())for x in open(0)))