KOREATECH 1074: 유일한 수 두개

Link : judge.koreatech.ac.kr/problem.php?id=1074

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Python

from sys import stdin
 
testcase = int(stdin.readline().strip())
 
while testcase:
    stack = []
    data_length = int(stdin.readline().strip())
    data = [int(i) for i in stdin.readline().strip().split(' ')]
    data.sort()
    for i in data:
        if len(stack) == 0:
            stack.append(i)
        else:
            if stack[-1] == i:
                stack.pop()
            else:
                stack.append(i)
    print(' '.join([str(i) for i in stack]))
    testcase -= 1
 

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