{"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n个数字构成的序列。\u003c/br\u003e\n现在让你在其中选择一个非空子列。\u003c/br\u003e\n使得这个子列中所有数字加起来,是一个奇数。\u003c/br\u003e\n且要求所有数字之和最大。\u003c/br\u003e"}},{"title":"Input","value":{"format":"HTML","content":"第一行一个整数n(1\u003c\u003dn\u003c\u003d10^5).\u003c/br\u003e\n第二行n个数字ai(-10^4\u003c\u003dai\u003c\u003d10^4).\u003c/br\u003e\n数据中,保证一定有一个子列的和为奇数。"}},{"title":"Output","value":{"format":"HTML","content":"输出一行,即最大和。"}},{"title":"Example","value":{"format":"HTML","content":"【输入1】\u003c/br\u003e\n3\u003c/br\u003e\n1 1 1\u003c/br\u003e\n【输出1】\u003c/br\u003e\n3\u003c/br\u003e\n\u003c/br\u003e\n【输入2】\u003c/br\u003e\n3\u003c/br\u003e\n2 -5 -3\u003c/br\u003e\n【输出2】\u003c/br\u003e\n-1\n\n"}}]}