{"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":"MD","content":"Aklice太无聊了,所以他想去找点乐子,于是他找到了可乐,可乐告诉给他一个游戏:\n\n给你一个由n个整数构成的序列a,玩家可以进行几个步骤,每一步他可以选择序列中的一个元素(我们把它定义为a_k)并删除它,此时所有等于a_k + 1和a_k - 1的也都必须从序列中被删除。这次操作会给玩家加a_k分。\n\nAklice太笨笨了,所以想请你帮助他计算最多能得多少分呢?\n\n第一行一个整数$n (1 \\leq n \\leq 10^{5})$表示这个序列中的数字的个数。\n\n第二行包含了n个整数$a_1,a_2,a_3,...,a_n (1 \\leq a_i \\leq 10^5)$.\n\n"}},{"title":"Input","value":{"format":"MD","content":"第一行一个整数$n (1 \\leq n \\leq 10^{5})$表示这个序列中的数字的个数。\n\n第二行包含了n个整数$a_1,a_2,a_3,...,a_n (1 \\leq a_i \\leq 10^5)$.\n"}},{"title":"Output","value":{"format":"MD","content":"输出一个整数,表示Aklice能得到的最高分。"}},{"title":"Sample 1","value":{"format":"MD","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e2\n1 2\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e2\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"Sample 2","value":{"format":"MD","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e3\n1 2 3\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e4\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"Sample 3","value":{"format":"MD","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e9\n1 2 1 3 2 2 2 2 3\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e10\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"Note","value":{"format":"MD","content":"\u003cp\u003eConsider the third test example. At first step we need to choose any element equal to \u003cspan class\u003d\"tex-span\"\u003e2\u003c/span\u003e. After that step our sequence looks like this \u003cspan class\u003d\"tex-span\"\u003e[2, 2, 2, 2]\u003c/span\u003e. Then we do \u003cspan class\u003d\"tex-span\"\u003e4\u003c/span\u003e steps, on each step we choose any element equals to \u003cspan class\u003d\"tex-span\"\u003e2\u003c/span\u003e. In total we earn \u003cspan class\u003d\"tex-span\"\u003e10\u003c/span\u003e points.\u003c/p\u003e"}}]}