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- #include <iostream>
- #include <cstdio>
- #include <algorithm>
- #include <cstring>
- #include <string>
- #include <cctype>
- #include <stack>
- #include <queue>
- #include <list>
- #include <vector>
- #include <map>
- #include <set>
- #include <sstream>
- #include <stdlib.h>
- #include <cmath>
- #define LL unsigned long long
- #define N 1000000
- using namespace std;
- char input [N];
- int main ()
- {
- while ( scanf ("%s", input) != EOF ) {
- int len = strlen (input);
- list <char> output;
- list <char>::iterator it = output.begin();
- for ( int i = 0; i < len; i++ ) {
- if ( input [i] == '[' ) it = output.begin();
- else if ( input [i] == ']' ) it = output.end();
- else output.insert(it, input [i]);
- }
- for ( it = output.begin(); it != output.end(); it++ )
- printf ("%c", *it);
- printf ("\n");
- }
- return 0;
- }
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