List题目

Lists

Consider a list (list = []). You can perform the following commands:

insert i e: Insert integer $at position .$
print: Print the list.
remove e: Delete the first occurrence of integer $.$
append e: Insert integer $at the end of the list.$
sort: Sort the list.
pop: Pop the last element from the list.
reverse: Reverse the list.

Initialize your list and read in the value of $followed by lines of commands where each command will be of the types listed above. Iterate through each command in order and perform the corresponding operation on your list.$

Input Format

The first line contains an integer, $, denoting the number of commands. Each line of the subsequent lines contains one of the commands described above.$

Constraints

The elements added to the list must be integers.

Output Format

For each command of type print, print the list on a new line.

Sample Input 0

12
insert 0 5
insert 1 10
insert 0 6
print
remove 6
append 9
append 1
sort
print
pop
reverse
print

Sample Output 0

[6, 5, 10]
[1, 5, 9, 10]
[9, 5, 1]

n = input()
l = []
for i in range(n):
    cmd = raw_input().split()
    if cmd[0] == "insert":
        l.insert(int(cmd[1]),int(cmd[2]))
    elif cmd[0] == "print":
        print l
    elif cmd[0] == "remove":
        l.remove(int(cmd[1]))
    elif cmd[0] == "append":
        l.append(int(cmd[1]))
    elif cmd[0] == "sort":
        l.sort()
    elif cmd[0] == "pop":
        l.pop()
    elif cmd[0] == "reverse":
        l.reverse()
    elif cmd[0] == "index":
        l.index(int(cmd[1]))
    elif cmd[0] == "count":
        l.count(int(cmd[1]))