{"problem":{"name":"OddString","description":{"content":"You are given a string $s$ consisting of lowercase English letters. Extract all the characters in the odd-indexed positions and print the string obtained by concatenating them. Here, the leftmost char","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"abc072_b"},"statements":[{"statement_type":"Markdown","content":"You are given a string $s$ consisting of lowercase English letters. Extract all the characters in the odd-indexed positions and print the string obtained by concatenating them. Here, the leftmost character is assigned the index $1$.\n\n## Constraints\n\n*   Each character in $s$ is a lowercase English letter.\n*   $1≤|s|≤10^5$\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":"abc072_b","tags":[],"sample_group":[["atcoder","acdr\n\nExtract the first character `a`, the third character `c`, the fifth character `d` and the seventh character `r` to obtain `acdr`."],["aaaa","aa"],["z","z"],["fukuokayamaguchi","fkoaaauh"]],"created_at":"2026-03-03 11:01:13"}}