Really really simple problem. Need to remember not to make incorrect assumptions. Problem gets easily solved once you use absolute values and you read the question again which tells you to print a blank line between outputs. :[<\/p>\n
\r\nimport java.io.PrintWriter;\r\nimport java.util.Scanner;\r\n\r\n\/**\r\n * \r\n * @author Sanchit M. Bhatnagar\r\n * @see http:\/\/uhunt.felix-halim.net\/id\/74004\r\n * \r\n *\/\r\npublic class P10963 {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tScanner sc = new Scanner(System.in);\r\n\t\tPrintWriter out = new PrintWriter(System.out);\r\n\r\n\t\tint W = sc.nextInt();\r\n\t\tfor (int i = 0; i < W; i++) {\r\n\t\t\tint C = sc.nextInt();\r\n\t\t\tboolean bad = false;\r\n\t\t\tint last = Math.abs(sc.nextInt() - sc.nextInt());\r\n\t\t\tfor (int j = 1; j < C; j++) {\r\n\t\t\t\tint tmp = Math.abs(sc.nextInt() - sc.nextInt());\r\n\t\t\t\tif (last != tmp)\r\n\t\t\t\t\tbad = true;\r\n\t\t\t}\r\n\t\t\tif (bad) {\r\n\t\t\t\tout.println("no");\r\n\t\t\t} else {\r\n\t\t\t\tout.println("yes");\r\n\t\t\t}\r\n\t\t\tif (i < W-1)\r\n\t\t\t\tout.println();\r\n\t\t}\r\n\r\n\t\tout.close();\r\n\t\tsc.close();\r\n\t}\r\n\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"