{"problem":{"name":"Echo","description":{"content":"You are given a string $S$ of length $N$ consisting of lowercase English letters.   We denote the $i$\\-th character of $S$ by $S_i$.   Print the string of length $2N$ obtained by concatenating $S_1,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":"abc306_a"},"statements":[{"statement_type":"Markdown","content":"You are given a string $S$ of length $N$ consisting of lowercase English letters.  \nWe denote the $i$\\-th character of $S$ by $S_i$.  \nPrint the string of length $2N$ obtained by concatenating $S_1,S_1,S_2,S_2,\\dots,S_N$, and $S_N$ in this order.  \nFor example, if $S$ is `beginner`, print `bbeeggiinnnneerr`.\n\n## Constraints\n\n*   $N$ is an integer such that $1 \\le N \\le 50$.\n*   $S$ is a string of length $N$ consisting of lowercase English letters.\n\n## Input\n\nThe input is given from Standard Input in the following format:\n\n$N$\n$S$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"abc306_a","tags":[],"sample_group":[["8\nbeginner","bbeeggiinnnneerr\n\nIt is the same as the example described in the problem statement."],["3\naaa","aaaaaa"]],"created_at":"2026-03-03 11:01:14"}}