{"problem":{"name":"B. Kids' Riddle","description":{"content":"Programmers' kids solve this riddle in 5-10 minutes. How fast can you do it?","description_type":"Markdown"},"platform":"Codeforces","limit":{"time_limit":2000,"memory_limit":65536},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"CF784B"},"statements":[{"statement_type":"Markdown","content":"Programmers' kids solve this riddle in 5-10 minutes. How fast can you do it?\n\n## Input\n\nThe input contains a single integer _n_ (0 ≤ _n_ ≤ 2000000000).\n\n## Output\n\nOutput a single integer.\n\n[samples]","is_translate":false,"language":"English"},{"statement_type":"Markdown","content":"程序员的孩子们能在5-10分钟内解出这个谜题。你有多快？\n\n输入包含一个整数 #cf_span[n] (#cf_span[0 ≤ n ≤ 2000000000])。\n\n请输出一个整数。\n\n## Input\n\n输入包含一个整数 #cf_span[n] (#cf_span[0 ≤ n ≤ 2000000000])。\n\n## Output\n\n请输出一个整数。\n\n[samples]","is_translate":true,"language":"Chinese"},{"statement_type":"Markdown","content":"Given:  \n- An integer $ n $, where $ 0 \\leq n \\leq 2 \\times 10^9 $.\n\nObjective:  \n- Output a single integer $ f(n) $, where $ f $ is an unknown function defined by the riddle.\n\n(Note: The problem statement provides no explicit mathematical definition of $ f(n) $. The function must be inferred from the context of the riddle, which is not provided.)","is_translate":false,"language":"Formal"}],"meta":{"iden":"CF784B","tags":[],"sample_group":[["11","2"],["14","0"],["61441","2"],["571576","10"],["2128506","3"]],"created_at":"2026-03-03 11:00:39"}}