I am getting an NZEC error in code chef promblem

Question

I am getting an NZEC error in code chef for the following code, this code runs fine in python shell but does'nt work for code chef the link to promblem is https://www.codechef.com/CIU2018/problems/C001/
code:-
n=input()
l=[]
temp=[[]]
for _ in range(int(n)):
c=input().split()
if c[0]=="1":
for i in c[1]:
l.append(i)
temp.append(l[:])
elif c[0]=="2":
for _ in range(1,int(c[1])+1):
del l[-1]
temp.append(l[:])
elif c[0]=="3":
print(l[int(c[1])-1])
elif c[0]=="4":
l=temp[-2]
del temp[-1]

Answer 1

i dont get it, what this script goal? its unclear question, so dont devote me