{"trustable":false,"sections":[{"title":"","value":{"format":"MD","content":"众所周知,旺宝是一条懒狗\n但是期末考试在即,他不得不复习了。\n旺宝的操作系统有n页,每页都有一个知识点ai(每个知识点都有一个编号),但是整本书有很多知识点重复,就旺宝目前的情况,他想阅读连续的最少页同时能够看到每一种知识点,问最少需要阅读的页数。"}},{"title":"Input","value":{"format":"MD","content":"第一行输入n,表示书的页数。(n \u003c\u003d 1e6)\n第二行输入n个整数a1,a2,...,an,表示每页书的知识点。\n保证每个ai在int范围内。"}},{"title":"Output","value":{"format":"MD","content":"输出一行表示答案"}},{"title":"Sample Input","value":{"format":"MD","content":"\u003cpre class\u003d\"sio\"\u003e5\n1 8 8 8 1\n\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"MD","content":"\u003cpre class\u003d\"sio\"\u003e2\u003c/pre\u003e"}}]}