{"trustable":false,"prependHtml":"\u003cscript\u003e window.katexOptions \u003d { disable: true }; \u003c/script\u003e\n\u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {\n inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027], [\u0027$\u0027,\u0027$\u0027]],\n displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027], [\u0027$$\u0027,\u0027$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\" type\u003d\"text/javascript\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"PLAIN","content":"给你一个矩阵,只由小写或大写字母构成。求出它的最大对称子矩阵的边长。\n其中对称矩阵是一个k*k的矩阵,它的元素关于从左下角到右上角的对角线对称。\n例如下面这个3*3的矩阵是对称矩阵:\ncbx \ncpb \nzcc"}},{"title":"Input","value":{"format":"PLAIN","content":"多组数据。每一组第一行是一个 n(n小于等于1000) ,下面是n行,每一行有n个字母,中间没有空格。数据以n\u003d0标志结束"}},{"title":"Output","value":{"format":"PLAIN","content":"每组数据输出最大的对称矩阵的边长。"}},{"title":"Sample Input","value":{"format":"PLAIN","content":"3\ncbx \ncpb \nzcc\n0"}},{"title":"Sample Output","value":{"format":"PLAIN","content":"3\n"}}]}