{"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":"HTML","content":"\u003cdiv\u003e\n赵思蕊学长很强,他虽然没有在大学期间拿到regional的牌子,但是他的图论功底却是非常强的,而且他因此被顺利的保研进了swust,现在他有一个很严重的问题,他需要一个篮子,但是篮子却要每一层都要有不同的花色,现在他想让你编程来实现他的想法。\n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003e 输入是一个三元组,分别是外筐尺寸n(n为满足0\u0026lt;n\u0026lt;80的奇整数),中心花色字符,外篮花色字符\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003e \u003cspan\u003e输出赵思蕊学长需要的花篮吧\u003c/span\u003e\u003c/p\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e\n11 B A\n5 @ W\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e AAAAAAAAA \nABBBBBBBBBA\nABAAAAAAABA\nABABBBBBABA\nABABAAABABA\nABABABABABA\nABABAAABABA\nABABBBBBABA\nABAAAAAAABA\nABBBBBBBBBA\n AAAAAAAAA \n\n @@@ \n@WWW@\n@W@W@\n@WWW@\n @@@ \u003c/pre\u003e"}}]}