{"trustable":false,"sections":[{"title":"Input","value":{"format":"PLAIN","content":"给定一个长度不超过1e6的字符串,有两种操作\n1. I ch p 在第p个字符前插入ch,若p大于总长度,则将ch插在最后一个字符后面\n2. Q p 询问第p个字符是什么\n操作总数\u003c\u003d2000"}},{"title":"Output","value":{"format":"PLAIN","content":"对于每一个询问输出一个字符"}},{"title":"Sample Input","value":{"format":"PLAIN","content":"ab\n7\nQ 1\nI c 2\nI d 4\nI e 2\nQ 5\nI f 1\nQ 3"}},{"title":"Sample Output","value":{"format":"PLAIN","content":"a\nd\ne"}},{"title":"F♂ck","value":{"format":"PLAIN","content":""}}]}