프로그래머스 - 같은 숫자는 싫어

 

 

 

---

import java.util.*;

public class Solution {
    public static Stack<Integer> solution(int []arr) {
       Stack<Integer> stack = new Stack<>();
       stack.push(arr[0]);
       for(int i = 1; i < arr.length; i++){
           if(stack.peek() != arr[i]){
               stack.push(arr[i]);
           }
       }
       return stack;
    }
}