{"trustable":false,"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 \u003cp\u003eGiven a sequence of n numbers $a_1, a_2, ..., a_n$ and a number of d-queries. A $d-query$ is a pair $(i, j)$ $(1 ≤ i ≤ j ≤ n)$. For each $d-query$ $(i, j)$, you have to return the number of distinct elements in the subsequence $a_i, a_{i+1}, ..., a_j$.\u003c/p\u003e\n"}},{"title":"","value":{"format":"HTML","content":" \u003ch3\u003eInput\u003c/h3\u003e\n \u003cul\u003e\n \u003cli\u003eLine 1: $n (1 \\leq n \\leq 30000)$.\u003c/li\u003e\n \u003cli\u003eLine 2: $n$ numbers $a_1, a_2, ..., a_n$ $(1 \\leq a_i \\leq 10^6)$.\u003c/li\u003e\n \u003cli\u003eLine 3: $q$ $(1 \\leq q \\leq 200000)$, the number of $d-queries$.\u003c/li\u003e\n \u003cli\u003eIn the next $q$ lines, each line contains 2 numbers $i, j$ representing a $d-query$ $(1 ≤ i \\leq j \\leq n)$.\u003c/li\u003e\n \u003c/ul\u003e\n"}},{"title":"","value":{"format":"HTML","content":" \u003ch3\u003eOutput\u003c/h3\u003e\n \u003cul\u003e\n \u003cli\u003eFor each d-query $(i, j)$, print the number of distinct elements in the subsequence $a_i, a_{i+1}, ..., a_j$ in a single line. \n \u003cp\u003e\u0026nbsp;\u003c/p\u003e\u003c/li\u003e\n \u003c/ul\u003e\n"}},{"title":"","value":{"format":"HTML","content":" \u003ch3\u003eExample\u003c/h3\u003e\n \n\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\n1 1 2 1 3\n3\n1 5\n2 4\n3 5\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e3\n2\n3\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}