1.2 KB | 1179 chars
"""
[32090: シンプルなエディタ](https://www.acmicpc.net/problem/32090)
Tier: Bronze 2
Category: implementation, simulation
"""
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
SYS_INPUT = True
RECURSION_LIMIT = 10 ** 7
SET_RECURSION = False
BLANK = " "
if SET_RECURSION:
sys.setrecursionlimit(RECURSION_LIMIT)
inp = lambda : sys.stdin.readline().rstrip() if SYS_INPUT else input()
mii = lambda : [*map(int,inp().split())]
mfi = lambda : [*map(float,inp().split())]
ii = lambda : int(inp())
fi = lambda : float(inp())
isplit = lambda : inp().split()
p = print
def gcd(a, b): return gcd(b, a % b) if b > 0 else a
def lcm(a, b): return a * b // gcd(a, b)
def solve():
while 1:
n = ii()
if n == 0:
break
s = ""
crt = 0
for _ in range(n):
command, c = isplit()
if command == "INSERT":
s = s[:crt] + c + s[crt:]
crt += 1
elif command == "LEFT":
crt = max(0, crt-1)
else:
crt = min(len(s), crt+1)
# p(s, crt)
p(s)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()