[백준] 1406 - 에디터 Python

https://www.acmicpc.net/problem/1406

1406번: 에디터

import sys

st1 = list(sys.stdin.readline().rstrip())
st2 = []

for _ in range(int(sys.stdin.readline())):
    command = list(sys.stdin.readline().split())
    if command[0] == 'L':
        if st1:
            st2.append(st1.pop())

    elif command[0] == 'D':
        if st2:
            st1.append(st2.pop())

    elif command[0] == 'B':
        if st1:
            st1.pop()

    else:
        st1.append(command[1])

st1.extend(reversed(st2))
print(''.join(st1))

 

 

 

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