{"problem":{"name":"/\\/\\/\\/","description":{"content":"A sequence $a_1,a_2,... ,a_n$ is said to be /\\\\/\\\\/\\\\/ when the following conditions are satisfied: *   For each $i = 1,2,..., n-2$, $a_i = a_{i+2}$. *   Exactly two different numbers appear in the s","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"arc103_a"},"statements":[{"statement_type":"Markdown","content":"A sequence $a_1,a_2,... ,a_n$ is said to be /\\\\/\\\\/\\\\/ when the following conditions are satisfied:\n\n*   For each $i = 1,2,..., n-2$, $a_i = a_{i+2}$.\n*   Exactly two different numbers appear in the sequence.\n\nYou are given a sequence $v_1,v_2,...,v_n$ whose length is even. We would like to make this sequence /\\\\/\\\\/\\\\/ by replacing some of its elements. Find the minimum number of elements that needs to be replaced.\n\n## Constraints\n\n*   $2 \\leq n \\leq 10^5$\n*   $n$ is even.\n*   $1 \\leq v_i \\leq 10^5$\n*   $v_i$ is an integer.\n\n## Input\n\nInput is given from Standard Input in the following format:\n\n$n$\n$v_1$ $v_2$ $...$ $v_n$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"arc103_a","tags":[],"sample_group":[["4\n3 1 3 2","1\n\nThe sequence $3,1,3,2$ is not /\\\\/\\\\/\\\\/, but we can make it /\\\\/\\\\/\\\\/ by replacing one of its elements: for example, replace the fourth element to make it $3,1,3,1$."],["6\n105 119 105 119 105 119","0\n\nThe sequence $105,119,105,119,105,119$ is /\\\\/\\\\/\\\\/."],["4\n1 1 1 1","2\n\nThe elements of the sequence $1,1,1,1$ are all the same, so it is not /\\\\/\\\\/\\\\/."]],"created_at":"2026-03-03 11:01:14"}}