{"problem":{"name":"E. Twisted Circuit","description":{"content":"
![image](https://espresso.codeforces.com/8f29dfb253ce9cd368f7ecc562d7be12eea631a3.png)
","description_type":"Markdown"},"platform":"Codeforces","limit":{"time_limit":2000,"memory_limit":65536},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"CF784E"},"statements":[{"statement_type":"Markdown","content":"
![image](https://espresso.codeforces.com/8f29dfb253ce9cd368f7ecc562d7be12eea631a3.png)
\n\n## Input\n\nThe input consists of four lines, each line containing a single digit 0 or 1.\n\n## Output\n\nOutput a single digit, 0 or 1.\n\n[samples]","is_translate":false,"language":"English"},{"statement_type":"Markdown","content":"输入由四行组成，每行包含一个数字 0 或 1。\n\n输出一个数字，0 或 1。\n\n## Input\n\n输入由四行组成，每行包含一个数字 0 或 1。\n\n## Output\n\n输出一个数字，0 或 1。\n\n[samples]","is_translate":true,"language":"Chinese"},{"statement_type":"Markdown","content":"Let $ a, b, c, d \\in \\{0, 1\\} $ be the four input bits.\n\nOutput: $ f(a, b, c, d) \\in \\{0, 1\\} $, where $ f $ is an unknown Boolean function defined by the problem's unspecified logic.","is_translate":false,"language":"Formal"}],"meta":{"iden":"CF784E","tags":["brute force","implementation"],"sample_group":[["0\n1\n1\n0","0"]],"created_at":"2026-03-03 11:00:39"}}