{"trustable":true,"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$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003eWelcome to the CCPC Qinhuangdao Site!\u003c/p\u003e\u003cp\u003eQinhuangdao is a beautiful coastal city full of charm, integrating historical heritage and modern civilization. It was named after the Emperor QinShiHuang\u0027s east tour in 215 BC for seeking immortals.\u003c/p\u003e\u003cp\u003eThe infiltration of more than 2000 years of history has left a rich cultural treasure here. Bo Yi, Shu Qi, Qi Jiguang, Cao Cao, and Mao Zedong, Many Heroes throughout the ages have endowed Qinhuangdao with the thousand-year cultural context, the unique and precious heritage, and the profound historical memory.\u003c/p\u003e\u003ccenter\u003e \u003cimg class\u003d\"tex-graphics\" src\u003d\"CDN_BASE_URL/daa75c8c3980527fb806ad4acc460b2e?v\u003d1716078279\" style\u003d\"max-width: 100.0%;max-height: 100.0%;\"\u003e \u003c/center\u003e \u003cp\u003ePleasant natural scenery has shaped her beautiful appearance. Thousands of miles of Yan Mountains, the Great Wall, and the vast seas are miraculously met here. The blue sky, green land, blue sea, and golden sand gather together to welcome guests.\u003c/p\u003e\u003cp\u003eTo toast your arrival, Alex prepared a simple problem to help you warm up.\u003c/p\u003e\u003cp\u003eAlex has $$$r$$$ red balls and $$$b$$$ blue balls. Then, Alex randomly chose two of these balls with equal probability. What is the probability that he chose two red balls?\u003c/p\u003e\u003cp\u003eOutput the required probability in the form of irreducible fraction. \u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003eThe first line of input gives the number of test cases, $$$T\\ (1 \\le T \\le 10)$$$. $$$T$$$ test cases follow.\u003c/p\u003e\u003cp\u003eFor each test case, the only line contains two integers $$$r,b\\ (1 \\le r,b \\le 100)$$$, where $$$r$$$ is the number of red balls and $$$b$$$ is the number of blue balls.\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003eFor each test case, output one line containing \"\u003cspan class\u003d\"tex-font-style-tt\"\u003eCase #x: y\u003c/span\u003e\", where $$$\\texttt{x}$$$ is the test case number (starting from $$$1$$$), and $$$\\texttt{y}$$$ is the answer in the form of irreducible fraction in format \u003cspan class\u003d\"tex-font-style-tt\"\u003eA/B\u003c/span\u003e.\u003c/p\u003e\u003cp\u003eIf the required probability equals to zero, output \u003cspan class\u003d\"tex-font-style-tt\"\u003e0/1\u003c/span\u003e. If the required probability equals to $$$1$$$, output \u003cspan class\u003d\"tex-font-style-tt\"\u003e1/1\u003c/span\u003e.\u003c/p\u003e"}},{"title":"Examples","value":{"format":"HTML","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 1\n2 1\n8 8\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003eCase #1: 0/1\nCase #2: 1/3\nCase #3: 7/30\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}