{"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":"\u003cscript type\u003d\u0027text/x-mathjax-config\u0027\u003eMathJax.Hub.Config({tex2jax: { inlineMath: [[\u0027$\u0027,\u0027$\u0027]] } }); \u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027 src\u003d\u0027https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\u0027\u003e\u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027\u003esetTimeout(function(){MathJax.Hub.Queue([\u0027Typeset\u0027, MathJax.Hub, \u0027left_view\u0027]);}, 2000);\u003c/script\u003e\n\u003cdiv class\u003d\"panel_content\"\u003e\n According to a research, VIM users tend to have shorter fingers, compared with Emacs users. \n \u003cbr\u003e Hence they prefer problems short, too. Here is a short one: \n \u003cbr\u003e Given n (0 \u0026lt;\u003d n \u0026lt;\u003d 10 \n \u003csup\u003e18\u003c/sup\u003e), You should solve for \n \u003cbr\u003e \n \u003ccenter\u003e\n g(g(g(n))) mod 10 \n \u003csup\u003e9\u003c/sup\u003e + 7 \n \u003c/center\u003e \n \u003cbr\u003e where \n \u003cbr\u003e \n \u003ccenter\u003e\n g(n) \u003d 3g(n - 1) + g(n - 2) \n \u003c/center\u003e \n \u003cbr\u003e \n \u003ccenter\u003e\n g(1) \u003d 1 \n \u003c/center\u003e \n \u003cbr\u003e \n \u003ccenter\u003e\n g(0) \u003d 0 \n \u003c/center\u003e \n \u003cbr\u003e \n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":" There are several test cases. For each test case there is an integer n in a single line. \n\u003cbr\u003e Please process until EOF (End Of File). \n\u003cbr\u003e"}},{"title":"Output","value":{"format":"HTML","content":" For each test case, please print a single line with a integer, the corresponding answer to this case. \n\u003cbr\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e0\n1\n2\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e0\n1\n42837\u003c/pre\u003e"}}]}