{"raw_statement":[{"iden":"statement","content":"See the problem statement here: [http://codeforces.com/contest/921/problem/01](//codeforces.com/contest/921/problem/01)."}],"translated_statement":[{"iden":"statement","content":"请参见问题描述：http://codeforces.com/contest/921/problem/01。\n\n"}],"sample_group":[],"show_order":[],"formal_statement":"**Definitions**  \nLet $ n \\in \\mathbb{Z}^+ $ be the length of the sequence.  \nLet $ A = (a_1, a_2, \\dots, a_n) $ be a sequence of positive integers.\n\n**Constraints**  \n$ 1 \\leq n \\leq 200 $,  \n$ 1 \\leq a_i \\leq 10^9 $ for all $ i \\in \\{1, \\dots, n\\} $.\n\n**Objective**  \nFind the maximum number of elements that can be selected from $ A $ such that the sum of the selected elements is odd.","simple_statement":null,"has_page_source":false}