{"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$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cstyle type\u003d\u0027text/css\u0027\u003e .input, .output {border: 1px solid #888888;} .output {margin-bottom:1em;position:relative;top:-1px;} .output pre,.input pre {background-color:#EFEFEF;line-height:1.25em;margin:0;padding:0.25em;} .title {background-color:#FFFFFF;border-bottom: 1px solid #888888;font-family:arial;font-weight:bold;padding:0.25em;} \u003c/style\u003e \u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027]], displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027]]}\n });\n \u003c/script\u003e\n \u003cscript type\u003d\"text/javascript\" async\n src\u003d\"https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\"\u003e\n \u003c/script\u003e\n\u003cp\u003e一个魔数必须仅由\"1\",\"14\",\"144\"来组成,比如\"14141144\"就是魔数,然而\"5114\",\"1444\"就不是魔数\u003c/p\u003e\n\u003cp\u003e现在给你一个正整数,请判断一下这个数字是不是魔数.\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003e输入有一行,一个整数n \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003en\u003c/i\u003e\u003c/span\u003e, \u003cspan class\u003d\"tex-span\"\u003e(1 ≤ \u003ci\u003en\u003c/i\u003e ≤ 10\u003csup class\u003d\"upper-index\"\u003e9\u003c/sup\u003e)\u003c/span\u003e.这个整数不含前导0.\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003e输出一行,若给出的数字是幸运数字,则输出 \"\u003cspan class\u003d\"tex-font-style-tt\"\u003eYES\u003c/span\u003e\" 否则输出 \"\u003cspan class\u003d\"tex-font-style-tt\"\u003eNO\u003c/span\u003e\" .\u003c/p\u003e"}},{"title":"Examples 1","value":{"format":"HTML","content":" Input\n \u003cpre\u003e114114\u003cbr\u003e\u003c/pre\u003e\n Output\n \u003cpre\u003eYES\u003cbr\u003e\u003c/pre\u003e\n\n "}},{"title":"Examples 2","value":{"format":"HTML","content":" Input\n \u003cpre\u003e1111\u003cbr\u003e\u003c/pre\u003e\n Output\n \u003cpre\u003eYES\u003cbr\u003e\u003c/pre\u003e\n"}},{"title":"Examples 3","value":{"format":"HTML","content":" Input\n \u003cpre\u003e441231\u003cbr\u003e\u003c/pre\u003e\n Output\n \u003cpre\u003eNO\u003cbr\u003e\u003c/pre\u003e\n"}}]}