[백준] #1302 베스트셀러

www.acmicpc.net/problem/1302

1302번: 베스트셀러

n = int(input())
books = dict()

for _ in range(n):
    key = input()
    if books.get(key): # if key not in book
        books[key] += 1
    else:
        books[key] = 1

max_value = max(books.values())

result = []
for key, value in books.items():
    if value == max_value:
        result.append(key)

print(sorted(result)[0])