{"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":"\u003cp\u003e 小Q喜欢吃糖果,他第一天吃1颗糖果,第二天吃2颗糖果...第N天吃N颗糖果,他想知道它这N天一共吃了多少糖果?请你帮忙写个程序计算\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cdiv\u003e \n \u003cspan\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003e多个输入,每个输入代表N,\u003c/span\u003e请读到文件末尾\u003c/span\u003e\u003c/span\u003e\u003c/span\u003e\n\u003c/div\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cdiv\u003e\n 对于每一个输入,输出小Q吃的糖果的总数,并输出一行空行\n\u003c/div\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cdiv\u003e \n \u003cdiv\u003e\n 1\n \u003c/div\u003e \n \u003cdiv\u003e\n 100\n \u003c/div\u003e \n\u003c/div\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cdiv\u003e \n \u003cdiv\u003e\n 1\n \u003c/div\u003e \n \u003cdiv\u003e\n \u0026nbsp;\n \u003c/div\u003e \n \u003cdiv\u003e\n 5050\n \u003c/div\u003e \n \u003cdiv\u003e\n \u0026nbsp;\n \u003c/div\u003e \n \u003cdiv\u003e\n \u0026nbsp;\n \u003c/div\u003e \n\u003c/div\u003e"}},{"title":"Hint","value":{"format":"HTML","content":"\u003cp\u003e \u003cspan\u003e\u003cspan\u003e答案不超过int64范围。\u003c/span\u003e\u003c/span\u003e\u003c/p\u003e"}}]}