{"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 \u003cdiv\u003e\n 在我们城市最高的建筑只有一个电梯。N是正整数,之后有N个正整数d,d表示楼层电梯将在哪层按照指定的顺序停止。电梯向上一层花费6秒,\n \u003cspan\u003e下一层花费4秒。电梯将在目标楼层停留5秒。\u003c/span\u003e\n \u003c/div\u003e \n \u003cdiv\u003e \n \u003cspan\u003e对于一个给定的数列\u003c/span\u003e,请计算总时间。电梯初始在第0层楼并结束时不必返回初始楼层。\n \u003c/div\u003e \n\u003c/div\u003e \n\u003cdiv\u003e\n \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\n \u003cimg src\u003d\"http://pic3.16pic.com/00/20/80/16pic_2080454_b.jpg\"\u003e\n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003e \u003cspan\u003e多组测试,\u003c/span\u003e\u0026nbsp;\u003cspan\u003e每组输入一个正整数N\u003c/span\u003e并跟着N个正整数。\u0026nbsp;\u003cspan\u003e所有数字输入时小于100。\u003c/span\u003e \u003cspan\u003e输入最后以0结束。\u003c/span\u003e \u003cspan\u003e这个测试用例不需要处理。\u003c/span\u003e\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003e \u003cspan\u003e输出每组测试用例所需时间。\u003c/span\u003e\u003c/p\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e\n1 2\n3 2 3 1\n0\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e\n17\n41\u003c/pre\u003e"}}]}