754 B | 754 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
BLANK = " "
# inp = input
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
INF = 999999999999999999999999999
def contains(num, l):
num = str(num)
for i in num:
i = int(i)
if i in l:
return True
return False
def solve():
n, *l = mii()
k = ii()
ans = INF
for i in range(1000):
if contains(i, l):
continue
ans = min(ans, abs(k - i))
p(ans)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()