[백준] 1764 python - 듣보잡(실버 4)

https://www.acmicpc.net/problem/1764

1트

집합 교집합 연산 & 사용가능
unpacking 시 * 사용

입력받기

m,a,*b=open(0).read().split()

내풀이

import sys

# input_lines = open(0).readlines()
n, k = map(int, sys.stdin.readline().rstrip().split())

first_hear = set()
first_see = set()
for _ in range(n):
    first_hear.add(sys.stdin.readline().rstrip())

for _ in range(k):
    first_see.add(sys.stdin.readline().rstrip())

first_hear.intersection_update(first_see)

print(len(first_hear))
for person in sorted(first_hear):
    print(person)