{"trustable":true,"sections":[{"title":"","value":{"format":"HTML","content":"给定一个字母串S;长度范围:1~255,插入若干字母,使之成为回文串,最少需要插入多少个字母?"}},{"title":"Input","value":{"format":"HTML","content":"第一行为字母串个数N;接下来N行,每行为一个字母串;"}},{"title":"Output","value":{"format":"HTML","content":"输出有N行,每行输出一个数,为对应字符串需插入的最少字母个数;"}},{"title":"Sample","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e3\r\naba\r\nab\r\nabcc\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e0\r\n1\r\n2\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"Hint","value":{"format":"HTML","content":"a 是一个回文串, aba是回文串,ab不是"}}]}