{"problem":{"name":"Swap Odd and Even","description":{"content":"You are given a string $S$ of even length consisting of lowercase English letters. Let $|S|$ be the length of $S$, and $S_i$ be the $i$\\-th character of $S$. Perform the following operation for each $","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"abc293_a"},"statements":[{"statement_type":"Markdown","content":"You are given a string $S$ of even length consisting of lowercase English letters. Let $|S|$ be the length of $S$, and $S_i$ be the $i$\\-th character of $S$.\nPerform the following operation for each $i = 1, 2, \\ldots, \\frac{|S|}{2}$ in this order, and print the final $S$.\n\n*   Swap $S_{2i-1}$ and $S_{2i}$.\n\n## Constraints\n\n*   $S$ is a string of even length consisting of lowercase English letters.\n*   The length of $S$ is at most $100$.\n\n## Input\n\nThe input is given from Standard Input in the following format:\n\n$S$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"abc293_a","tags":[],"sample_group":[["abcdef","badcfe\n\nInitially, $S =$ `abcdef`.  \nPerforming the operation for $i = 1$ swaps $S_1$ and $S_2$, making $S =$ `bacdef`.  \nPerforming the operation for $i = 2$ swaps $S_3$ and $S_4$, making $S =$ `badcef`.  \nPerforming the operation for $i = 3$ swaps $S_5$ and $S_6$, making $S =$ `badcfe`.  \nThus, `badcfe` should be printed."],["aaaa","aaaa"],["atcoderbeginnercontest","taocedbrgeniencrnoetts"]],"created_at":"2026-03-03 11:01:14"}}