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 C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<iostream>
#include<cmath>
#include<string>
#include<queue>
#include<map>
#include<set>
#include<vector>
#include<algorithm>
#define P pair<long long, long long>


using namespace std;
const long long int MOD=1e9+7;
const int STD=500000;

int main(){
  string s;
  char str[1000000];
  int q;
  cin >> s >> q;
  for(int i=0;i<s.length();i++){
    str[STD+i] = s[i];
  }
  int l=STD, r=STD+s.length()-1;
  bool direction=true;
  for(int i=0;i<q;i++){
    int tmp;
    cin >> tmp;
    if(tmp==1){
      direction ^= true;
    }
    else if(tmp==2){
      int f;
      char c;
      cin >> f >> c;
      if(direction ^ (f==1)){
        l++;
        str[l]=c;
      }
      else{
        r--;
        str[r]=c;
      }
    }
  }
  if(direction){
    for(int i=r;i<=l;i++){
      cout << str[i];
    }
  }
  else{
    for(int i=l;i>=r;i--){
      cout << str[i];
    }
  }
  cout << endl;
}