{"code":"giaoxu01","name":"giaoxu01","description":"1, 1, 2, 1, 2, 3, 1, 2, 3, 4, ....\r\n\r\n\r\nNhập $n(n \\leq 10^{14})$. \r\n\r\n**Yêu cầu:** In ra số thứ $n$ của dãy.\r\n#### Example\r\n\r\n!!! question \"Test 1\"\r\n    ???+ \"Input\"\r\n        ```sample\r\n        5 \r\n        ```\r\n    ???+ success \"Output\"\r\n        ```sample\r\n        2\r\n        ```","points":100.0,"partial":false,"time_limit":1.0,"memory_limit":655360,"short_circuit":false,"allowed_languages":[3,4,34,36,37,5,6,11,12,14,28,2,38,39,9,18,17,29,23,27,35,25,26,10,7,19,32,1,8,15,16,24,20,33,13,41,21,40],"is_public":true,"is_manually_managed":false,"permissions":{"can_edit":false}}