[백준 온라인저지] 1764. 듣보잡

문제

 

예제

 

소스코드

시간 : 88ms

import sys

n, m = map(int, sys.stdin.readline().split(' '))

names = {}
for x in range(n) :
    key = sys.stdin.readline().rstrip()
    names[key] = True

count = 0
answers = []
for x in range(m) :
    target = sys.stdin.readline().rstrip()
    if names.get(target) :
        count += 1
        answers.append(target)
    
print(count)
answers.sort()
for x in answers :
    print(x)