{"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$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cstyle type\u003d\u0027text/css\u0027\u003e .input, .output {border: 1px solid #888888;} .output {margin-bottom:1em;position:relative;top:-1px;} .output pre,.input pre {background-color:#EFEFEF;line-height:1.25em;margin:0;padding:0.25em;} .title {background-color:#FFFFFF;border-bottom: 1px solid #888888;font-family:arial;font-weight:bold;padding:0.25em;} \u003c/style\u003e \u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027]], displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027]]}\n });\n \u003c/script\u003e\n \u003cscript type\u003d\"text/javascript\" async\n src\u003d\"https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\"\u003e\n \u003c/script\u003e\n\u003cp\u003e粉兔对上次的失败耿耿于怀\u003c/p\u003e\n\u003cp\u003e她在n个地点安放了暗哨,每个暗哨都在直线y\u003dax+b上,现在粉兔知道每个暗哨开始的横坐标Xi,且每个暗哨每秒会向右走Vx格(负的就是向左走),和向上走Vy格。当某个暗哨和另外一个暗哨撞在了一起,则两个暗哨就会使用以前没有用过的暗号。 \u003c/p\u003e\n”天王盖地虎“ \u003c/p\u003e\n”小马大法好\"\u003c/p\u003e\n求最后所有暗哨用了多少的暗号数量\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003e第一行三个整数n,a,b,\u003c/p\u003e\n\u003cp\u003e每行三个整数Xi,Vx,Vy\u003c/p\u003e\n\u003cp\u003e没有两个暗哨在开始时会被放在一起\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003e输出答案\u003c/p\u003e"}},{"title":"Examples","value":{"format":"HTML","content":"\u003cdiv class\u003d\"sample-test\"\u003e\n \u003cdiv class\u003d\"input\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Input\n \u003c/div\u003e\n \u003cpre\u003e4 1 1\u003cbr\u003e1 -1 -1\u003cbr\u003e2 1 1\u003cbr\u003e3 1 1\u003cbr\u003e4 -1 -1\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"output\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Output\n \u003c/div\u003e\n \u003cpre\u003e8\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"input\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Input\n \u003c/div\u003e\n \u003cpre\u003e3 1 0\u003cbr\u003e-1 1 0\u003cbr\u003e0 0 -1\u003cbr\u003e1 -1 -2\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"output\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Output\n \u003c/div\u003e\n \u003cpre\u003e6\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"input\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Input\n \u003c/div\u003e\n \u003cpre\u003e3 1 0\u003cbr\u003e0 0 0\u003cbr\u003e1 0 0\u003cbr\u003e2 0 0\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"output\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Output\n \u003c/div\u003e\n \u003cpre\u003e0\u003cbr\u003e\u003c/pre\u003e\n \u003c/div\u003e\n\u003c/div\u003e"}},{"title":"Note","value":{"format":"HTML","content":"\u003cp\u003e四个地方会相撞: (1,2,-0.5), (1,3,-1), (2,4,+1), (3,4,+0.5)。 (u,v,t)的意思是暗哨 u 和 v 在第 t 秒相撞. 每次相撞两个暗哨都会各使用一次暗号,所以 ans\u003d2*4\u003d8.\u003c/p\u003e\n\u003cp\u003e在第二个样例,每个暗哨都会在第一秒撞上\u003c/p\u003e\n\u003ccenter\u003e \n \u003cimg class\u003d\"tex-graphics\" src\u003d\"CDN_BASE_URL/84cb7810e9c39ac9b15ef0a302b056f7?v\u003d1529155052\" style\u003d\"max-width: 100.0%;max-height: 100.0%;\" SRC\u003d\"CDN_BASE_URL/84cb7810e9c39ac9b15ef0a302b056f7?v\u003d1529155052\"\u003e \n\u003c/center\u003e\n\u003cp\u003e红色箭头是第一个暗哨,橙色箭头是第二个暗哨,蓝色箭头是第三个暗哨。\u003c/p\u003e"}}]}