{"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":"\u003cscript type\u003d\u0027text/x-mathjax-config\u0027\u003eMathJax.Hub.Config({tex2jax: { inlineMath: [[\u0027$\u0027,\u0027$\u0027]] } }); \u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027 src\u003d\u0027https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\u0027\u003e\u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027\u003esetTimeout(function(){MathJax.Hub.Queue([\u0027Typeset\u0027, MathJax.Hub, \u0027left_view\u0027]);}, 2000);\u003c/script\u003e\n\u003cdiv class\u003d\"panel_content\"\u003e\n 第一次世界大战后,许多城市遭到严重破坏,我们需要重建这些城市。但是,某些材料只能在某些地方生产。所以我们需要将这些材料从一个城市运到另一个城市。由于战争期间大部分道路已被完全摧毁,两个城市之间可能没有路径,也没有环存在。 \n现在,你的任务来了。在告诉您道路状况后,我们想知道任何两个城市之间是否存在路径。如果答案是肯定的,则输出它们之间的最短路径。\n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"输入由多个问题实例组成。对于每个实例,第一行包含三个整数n,m和c,2 \u003c\u003d n \u003c\u003d 10000,0 \u003c\u003d m \u003c10000,1 \u003c\u003d c \u003c\u003d 1000000。 n表示从1到n编号的城市数。在m行之后,每行有三个整数i,j和k,表示城市i和城市j之间的道路,长度为k。最后的c行,每行i,j两个整数,表示城市i和城市j的查询。"}},{"title":"Output","value":{"format":"HTML","content":"For each problem instance, one line for each query. If no path between two cities, output “Not connected”, otherwise output the length of the shortest path between them."}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e5 3 2\n1 3 2\n2 4 3\n5 2 3\n1 4\n4 5\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003eNot connected\n6\n\n\n \n \u003ci style\u003d\"font-size:1px\"\u003e \u003c/i\u003e\u003c/pre\u003e"}},{"title":"Hint","value":{"format":"HTML","content":"\u003cpre\u003e\nHint\n\nHuge input, scanf recommended.\n\n \n \u003c/pre\u003e"}}]}