[프로그래머스/Java] Lv.1 없는 숫자 더하기
문제 풀이 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 import java.util.ArrayList; import java.util.Arrays; import java.util.stream.Collectors; class Solution { public int solution(int[] numbers) { int answer = 0; int[] ten = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; ArrayList num = (ArrayList) Arrays.stream(numbers).boxed().collect(Collectors.toList()); ArrayList t = (ArrayList) Arrays.stream(ten).boxed()..