{"trustable":false,"prependHtml":"\u003cstyle type\u003d\u0027text/css\u0027\u003e\n .input, .output {\n border: 1px solid #888888;\n }\n .output {\n margin-bottom: 1em;\n position: relative;\n top: -1px;\n }\n .output pre, .input pre {\n background-color: #EFEFEF;\n line-height: 1.25em;\n margin: 0;\n padding: 0.25em;\n }\n \u003c/style\u003e\n \u003clink rel\u003d\"stylesheet\" href\u003d\"//codeforces.org/s/96598/css/problem-statement.css\" type\u003d\"text/css\" /\u003e\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 type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"给你一个n*n的棋盘。\u003c/br\u003e\n你可以在棋盘的每个位置放置一个兵。\u003c/br\u003e\n这个兵(x,y)与普通的兵不一样,它比较牛逼,可以攻击和它相邻的四个位置(x+1,y),(x-1,y),(x,y-1),(x,y+1)。\u003c/br\u003e\n现在问你,你最多能够在这个棋盘上放置多少个兵,使得他们俩俩之间不会互相攻击到?"}},{"title":"输入格式","value":{"format":"HTML","content":"输入只有一个整数n(1\u003c\u003dn\u003c\u003d1000)."}},{"title":"输出格式","value":{"format":"HTML","content":"对于输入的一个n*n棋盘.\u003c/br\u003e\n第一行,输出一个整数maxcnt,表示最多能放置的兵的个数.\u003c/br\u003e\n接下来的n行,用来描述第i行的棋盘的信息.\u003c/br\u003e\n\u0027.\u0027表示空的格子,\u0027C\u0027表示兵.\u003c/br\u003e\n如果有多种结果,输出其中任意一种即可。"}},{"title":"样例","value":{"format":"HTML","content":"\u003cdiv class\u003d\"sample-test\"\u003e\n \u003cdiv class\u003d\"input\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n样例输入\n \u003c/div\u003e\n \u003cpre\u003e2\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"output\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n样例输出\n \u003c/div\u003e\n \u003cpre\u003e2\u003cbr\u003eC.\u003cbr\u003e.C\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n\u003c/div\u003e"}},{"title":"提示","value":{"format":"HTML","content":"大胆地尝试自己的想法。"}}]}