{"raw_statement":[{"iden":"problem statement","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."},{"iden":"constraints","content":"*   $2 \\leq n \\leq 10^5$\n*   $n$ is even.\n*   $1 \\leq v_i \\leq 10^5$\n*   $v_i$ is an integer."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$n$\n$v_1$ $v_2$ $...$ $v_n$"},{"iden":"sample input 1","content":"4\n3 1 3 2"},{"iden":"sample output 1","content":"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 $3,1,3,1$."},{"iden":"sample input 2","content":"6\n105 119 105 119 105 119"},{"iden":"sample output 2","content":"0\n\nThe sequence $105,119,105,119,105,119$ is /\\\\/\\\\/\\\\/."},{"iden":"sample input 3","content":"4\n1 1 1 1"},{"iden":"sample output 3","content":"2\n\nThe elements of the sequence $1,1,1,1$ are all the same, so it is not /\\\\/\\\\/\\\\/."}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}