Problem:
Score : 400 points

Problem Statement

Takahashi has a string S consisting of lowercase English letters.

Starting with this string, he will produce a new one in the procedure given as follows.

The procedure consists of Q operations. In Operation i (1 \leq i \leq Q), an integer T_i is provided, which means the following:

If T_i = 1: reverse the string S.

If T_i = 2: An integer F_i and a lowercase English letter C_i are additionally provided.

If F_i = 1 : Add C_i to the beginning of the string S.

If F_i = 2 : Add C_i to the end of the string S.

Help Takahashi by finding the final string that results from the procedure.

Constraints

1 \leq |S| \leq 10^5

S consists of lowercase English letters.

1 \leq Q \leq 2 \times 10^5

T_i = 1 or 2.

F_i = 1 or 2, if provided.

C_i is a lowercase English letter, if provided.

Input

Input is given from Standard Input in the following format:

S
Q
Query_1
:
Query_Q

In the 3-rd through the (Q+2)-th lines, Query_i is one of the following:

1

which means T_i = 1, and:

2 F_i C_i

which means T_i = 2.

Output

Print the resulting string.

Sample Input 1

a
4
2 1 p
1
2 2 c
1

Sample Output 1

cpa

There will be Q = 4 operations. Initially, S is a.

Operation 1: Add p at the beginning of S. S becomes pa.

Operation 2: Reverse S. S becomes ap.

Operation 3: Add c at the end of S. S becomes apc.

Operation 4: Reverse S. S becomes cpa.

Thus, the resulting string is cpa.

Sample Input 2

a
6
2 2 a
2 1 b
1
2 2 c
1
1

Sample Output 2

aabc

There will be Q = 6 operations. Initially, S is a.

Operation 1: S becomes aa.

Operation 2: S becomes baa.

Operation 3: S becomes aab.

Operation 4: S becomes aabc.

Operation 5: S becomes cbaa.

Operation 6: S becomes aabc.

Thus, the resulting string is aabc.

Sample Input 3

y
1
2 1 x

Sample Output 3

xy

Solution in Python (3.4.3) (judge verdict: Time Limit Exceeded)

#!/usr/bin/env python3
import itertools


def main():
    S = input()
    Q = int(input())
    Queries = []

    Queries = [input().split() for i in range(Q)]
    Queries = [int(q[0]) if len(q) == 1 else [int(q[0]), int(q[1]), q[2]] for q in Queries]

    cumsum_Queries_preprocessing = [1 if q == 1 else 0 for q in Queries]
    current = sum(cumsum_Queries_preprocessing)
    cumsum_Queries = list(itertools.accumulate(cumsum_Queries_preprocessing))
    cumsum_Queries = [current - cumsum_Queries[i] for i in range(Q)]

    if current % 2 == 0:
        S = S
    else:
        S = S[::-1]

    for s, q in zip(cumsum_Queries, Queries):
        if q != 1:
            if q[1] == 1:
                if s % 2 == 0:
                    S = q[2] + S
                else:
                    S += q[2][::-1]
            else:
                if s % 2 == 0:
                    S += q[2]
                else:
                    S = q[2][::-1] + S
    print(S)
    pass

if __name__ == '__main__':
    main()