{"trustable":true,"prependHtml":"\u003cstyle type\u003d\"text/css\"\u003e\n section 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\u003cscript\u003e\n window.katexOptions \u003d {\n delimiters: [\n {left: \u0027\\\\(\u0027, right: \u0027\\\\)\u0027, display: false},\n {left: \u0027\\\\[\u0027, right: \u0027\\\\]\u0027, display: true}\n ]\n };\n\u003c/script\u003e\n","sections":[{"title":"Problem Statement","value":{"format":"HTML","content":"\r\n\u003csection\u003e\r\n\u003cp\u003eYou are given \u003cvar\u003e\\(N\\)\u003c/var\u003e sequences numbered \u003cvar\u003e\\(1\\)\u003c/var\u003e to \u003cvar\u003e\\(N\\)\u003c/var\u003e.\u003cbr\u003e\r\nSequence \u003cvar\u003e\\(i\\)\u003c/var\u003e has a length of \u003cvar\u003e\\(L_i\\)\u003c/var\u003e and its \u003cvar\u003e\\(j\\)\u003c/var\u003e-th element \u003cvar\u003e\\((1 \\leq j \\leq L_i)\\)\u003c/var\u003e is \u003cvar\u003e\\(a_{i,j}\\)\u003c/var\u003e.\u003c/p\u003e\r\n\u003cp\u003eSequence \u003cvar\u003e\\(i\\)\u003c/var\u003e and Sequence \u003cvar\u003e\\(j\\)\u003c/var\u003e are considered the same when \u003cvar\u003e\\(L_i \u003d L_j\\)\u003c/var\u003e and \u003cvar\u003e\\(a_{i,k} \u003d a_{j,k}\\)\u003c/var\u003e for every \u003cvar\u003e\\(k\\)\u003c/var\u003e \u003cvar\u003e\\((1 \\leq k \\leq L_i)\\)\u003c/var\u003e.\u003cbr\u003e\r\nHow many different sequences are there among Sequence \u003cvar\u003e\\(1\\)\u003c/var\u003e through Sequence \u003cvar\u003e\\(N\\)\u003c/var\u003e?\u003c/p\u003e\r\n\u003c/section\u003e\r\n"}},{"title":"Constraints","value":{"format":"HTML","content":"\r\n\u003csection\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e\u003cvar\u003e\\(1 \\leq N \\leq 2 \\times 10^5\\)\u003c/var\u003e\u003c/li\u003e\r\n\u003cli\u003e\u003cvar\u003e\\(1 \\leq L_i \\leq 2 \\times 10^5\\)\u003c/var\u003e \u003cvar\u003e\\((1 \\leq i \\leq N)\\)\u003c/var\u003e\u003c/li\u003e\r\n\u003cli\u003e\u003cvar\u003e\\(0 \\leq a_{i,j} \\leq 10^{9}\\)\u003c/var\u003e \u003cvar\u003e\\((1 \\leq i \\leq N, 1 \\leq j \\leq L_i)\\)\u003c/var\u003e\u003c/li\u003e\r\n\u003cli\u003eThe total number of elements in the sequences, \u003cvar\u003e\\(\\sum_{i\u003d1}^N L_i\\)\u003c/var\u003e, does not exceed \u003cvar\u003e\\(2 \\times 10^5\\)\u003c/var\u003e.\u003c/li\u003e\r\n\u003cli\u003eAll values in input are integers.\u003c/li\u003e\r\n\u003c/ul\u003e\r\n\u003c/section\u003e\r\n"}},{"title":"Input","value":{"format":"HTML","content":"\r\n\u003csection\u003e\r\n\u003cp\u003eInput is given from Standard Input in the following format:\u003c/p\u003e\r\n\u003cpre\u003e\u003cvar\u003e\\(N\\)\u003c/var\u003e\r\n\u003cvar\u003e\\(L_1\\)\u003c/var\u003e \u003cvar\u003e\\(a_{1,1}\\)\u003c/var\u003e \u003cvar\u003e\\(a_{1,2}\\)\u003c/var\u003e \u003cvar\u003e\\(\\dots\\)\u003c/var\u003e \u003cvar\u003e\\(a_{1,L_1}\\)\u003c/var\u003e\r\n\u003cvar\u003e\\(L_2\\)\u003c/var\u003e \u003cvar\u003e\\(a_{2,1}\\)\u003c/var\u003e \u003cvar\u003e\\(a_{2,2}\\)\u003c/var\u003e \u003cvar\u003e\\(\\dots\\)\u003c/var\u003e \u003cvar\u003e\\(a_{2,L_2}\\)\u003c/var\u003e\r\n\u003cvar\u003e\\(\\vdots\\)\u003c/var\u003e\r\n\u003cvar\u003e\\(L_N\\)\u003c/var\u003e \u003cvar\u003e\\(a_{N,1}\\)\u003c/var\u003e \u003cvar\u003e\\(a_{N,2}\\)\u003c/var\u003e \u003cvar\u003e\\(\\dots\\)\u003c/var\u003e \u003cvar\u003e\\(a_{N,L_N}\\)\u003c/var\u003e\r\n\u003c/pre\u003e\r\n\u003c/section\u003e\r\n"}},{"title":"Output","value":{"format":"HTML","content":"\r\n\u003csection\u003e\r\n\u003cp\u003ePrint the number of different sequences.\u003c/p\u003e\r\n\u003c/section\u003e\r\n"}},{"title":"Sample 1","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\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\u003e4\r\n2 1 2\r\n2 1 1\r\n2 2 1\r\n2 1 2\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e3\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\r\n\u003csection\u003e\r\n\r\n\u003c/section\u003e\r\n\r\n\u003csection\u003e\r\n\r\n\u003cp\u003eSample Input \u003cvar\u003e\\(1\\)\u003c/var\u003e contains four sequences:\u003c/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eSequence \u003cvar\u003e\\(1\\)\u003c/var\u003e : \u003cvar\u003e\\((1, 2)\\)\u003c/var\u003e\u003c/li\u003e\r\n\u003cli\u003eSequence \u003cvar\u003e\\(2\\)\u003c/var\u003e : \u003cvar\u003e\\((1, 1)\\)\u003c/var\u003e\u003c/li\u003e\r\n\u003cli\u003eSequence \u003cvar\u003e\\(3\\)\u003c/var\u003e : \u003cvar\u003e\\((2, 1)\\)\u003c/var\u003e\u003c/li\u003e\r\n\u003cli\u003eSequence \u003cvar\u003e\\(4\\)\u003c/var\u003e : \u003cvar\u003e\\((1, 2)\\)\u003c/var\u003e \u003c/li\u003e\r\n\u003c/ul\u003e\r\n\u003cp\u003eExcept that Sequence \u003cvar\u003e\\(1\\)\u003c/var\u003e and Sequence \u003cvar\u003e\\(4\\)\u003c/var\u003e are the same, these sequences are pairwise different, so we have three different sequences.\u003c/p\u003e\r\n\u003c/section\u003e\r\n"}},{"title":"Sample 2","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\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\u003e5\r\n1 1\r\n1 1\r\n1 2\r\n2 1 1\r\n3 1 1 1\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e4\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\r\n\u003csection\u003e\r\n\r\n\u003c/section\u003e\r\n\r\n\u003csection\u003e\r\n\r\n\u003cp\u003eSample Input \u003cvar\u003e\\(2\\)\u003c/var\u003e contains five sequences:\u003c/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eSequence \u003cvar\u003e\\(1\\)\u003c/var\u003e : \u003cvar\u003e\\((1)\\)\u003c/var\u003e\u003c/li\u003e\r\n\u003cli\u003eSequence \u003cvar\u003e\\(2\\)\u003c/var\u003e : \u003cvar\u003e\\((1)\\)\u003c/var\u003e\u003c/li\u003e\r\n\u003cli\u003eSequence \u003cvar\u003e\\(3\\)\u003c/var\u003e : \u003cvar\u003e\\((2)\\)\u003c/var\u003e\u003c/li\u003e\r\n\u003cli\u003eSequence \u003cvar\u003e\\(4\\)\u003c/var\u003e : \u003cvar\u003e\\((1, 1)\\)\u003c/var\u003e \u003c/li\u003e\r\n\u003cli\u003eSequence \u003cvar\u003e\\(5\\)\u003c/var\u003e : \u003cvar\u003e\\((1, 1, 1)\\)\u003c/var\u003e \u003c/li\u003e\r\n\u003c/ul\u003e\r\n\u003c/section\u003e\r\n"}},{"title":"Sample 3","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\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\u003e1\r\n1 1\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e1\r\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\r\n\u003csection\u003e\r\n\r\n\u003c/section\u003e\r\n\r\n\u003csection\u003e\r\n\u003c/section\u003e\r\n"}}]}