{"trustable":true,"prependHtml":"\u003cstyle type\u003d\"text/css\"\u003e\n #problem-body \u003e pre {\n display: block;\n padding: 9.5px;\n margin: 0 0 10px;\n font-size: 13px;\n line-height: 1.42857143;\n word-break: break-all;\n word-wrap: break-word;\n color: #333;\n background: rgba(255, 255, 255, 0.5);\n border: 1px solid #ccc;\n border-radius: 6px;\n }\n\u003c/style\u003e\n","sections":[{"title":"","value":{"format":"HTML","content":"\u003cdiv id\u003d\"problem-body\"\u003e\n\t\u003cp\u003eA number of cities are connected by a network of highways. Each highway is bidirectional and\r\nconnects two cities, with a given travel time. What is the shortest time to get from a given city to\r\nanother given city?\r\n\r\n\u003c/p\u003e\u003ch3\u003eInput\u003c/h3\u003e\r\n\u003cp\u003eThe first line of input contains the number of test cases.\u003cbr\u003e\u003cbr\u003e\r\nEach test case starts with a line containing the number of cities n (2 ≤ n ≤ 100000), the number\r\nof highways m (1 ≤ m ≤ 100000), the starting city and the ending city. Cities are numbered from\r\n1 to n.\u003cbr\u003e\u003cbr\u003e\r\nThen m lines follow, each describing one highway. The description consists of the two distinct city\r\nnumbers and the time in minutes to travel along the highway. The time will be between 1 and\r\n1000.\u003cbr\u003e\r\n\r\n\r\n\u003c/p\u003e\u003ch3\u003eOutput\u003c/h3\u003e\r\n\u003cp\u003eFor each test case output a single line containing the minimum time it takes to get from the start\r\nto the destination. If no connection exists, output \u003ctt\u003eNONE\u003c/tt\u003e.\r\n\r\n\u003c/p\u003e\u003ch3\u003eExample\u003c/h3\u003e\r\n\r\n\u003cdiv\u003e\u003ctable class\u003d\"vjudge_sample\"\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\u003e2\r\n4 2 1 4\r\n1 2 5\r\n3 4 5\r\n4 4 1 4\r\n1 2 5\r\n2 3 5\r\n3 4 5\r\n4 2 6\r\n\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003eNONE\r\n11\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003c/div\u003e\r\n\n\u003c/div\u003e"}}]}