https://www.acmicpc.net/problem/11645 11645번: I’ve Been Everywhere, Man The first line of input contains a single positive integer T ≤ 50 indicating the number of test cases. The first line of each test case also contains a single positive integer n indicating the number of work trips Alice has taken so far. The following n www.acmicpc.net 문제 해설 주인공이 다녀온 모든 도시의 개수를 출력하는 문제다.(중복 없이) 이런 문제는 map[st..