데일리디벨롭

문제 백준 5397 - 키로거 코드 test_case = int(input()) for _ in range(test_case): left_stack = [] right_stack = [] data = input() for i in data: if i == '-': if left_stack: left_stack.pop() elif i == '': if right_stack: left_stack.append(right_stack.pop()) else: left_stack.append(i) left_stack.extend(reversed(right_stack)) print(''.join(left_stack))