{"trustable":false,"sections":[{"title":"","value":{"format":"HTML","content":"\u003cdiv class\u003d\"ptx\" lang\u003d\"en-US\"\u003e\r\n\t\u003cspan style\u003d\"font-family:arial,helvetica,sans-serif;\"\u003eBuilding and maintaining roads among communities in the far North is an expensive business. With this in mind, the roads are build such that there is only one route from a village to a village that does not pass through some other village twice.\u003cbr /\u003e\r\n\tGiven is an area in the far North comprising a number of villages and roads among them such that any village can be reached by road from any other village. Your job is to find the road distance between the two most remote villages in the area.\u003cbr /\u003e\r\n\t\u003cbr /\u003e\r\n\tThe area has up to 10,000 villages connected by road segments. The villages are numbered from 1.\u003c/span\u003e\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cdiv class\u003d\"ptx\" lang\u003d\"en-US\"\u003e\r\n\t\u003cspan style\u003d\"font-family:arial,helvetica,sans-serif;\"\u003eInput to the problem is a sequence of lines, each containing three positive integers: the number of a village, the number of a different village, and the length of the road segment connecting the villages in kilometers. All road segments are two-way.\u003c/span\u003e\u003c/div\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cdiv class\u003d\"ptx\" lang\u003d\"en-US\"\u003e\r\n\t\u003cspan style\u003d\"font-family:arial,helvetica,sans-serif;\"\u003eYou are to output a single integer: the road distance between the two most remote villages in the area.\u003c/span\u003e\u003c/div\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre class\u003d\"sio\"\u003e\r\n\u003cspan style\u003d\"font-family:arial,helvetica,sans-serif;\"\u003e5 1 6\r\n1 4 5\r\n6 3 9\r\n2 6 8\r\n6 1 7\r\n\u003c/span\u003e\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre class\u003d\"sio\"\u003e\r\n22\u003c/pre\u003e"}}]}