{"raw_statement":[{"iden":"statement","content":"在程序中定义一函数 $digit(n,k)$，它能分离出整数 $n$ 从右边数第 $k$ 个数字。"},{"iden":"input","content":"正整数 $n$ 和 $k$。"},{"iden":"output","content":"一个数字。"},{"iden":"note","content":"$n \\le 10^9$。\n\n$k \\le 10$。"}],"translated_statement":null,"sample_group":[["31859 3","8"]],"show_order":[],"formal_statement":null,"simple_statement":null,"has_page_source":false}