{"code":"code2","name":"Code 2","description":"Cho đoạn code sau \r\n\r\n\r\n         int s=0;\r\n         for (int i=1;i<=n;i++) if (i%2) s--; else s+=2;\r\n\r\n\r\nNhập $n$ in ra giá trị $s$ sau đoạn code trên.\r\n\r\n<h4>Example</h4>\r\n\r\n!!! question \"Test 1\"\r\n\r\n    ???+ \"Input\"\r\n\r\n        ```sample\r\n        1\r\n        ```\r\n\r\n    ???+ success \"Output\"\r\n\r\n        ```sample\r\n        -1\r\n        ```","points":100.0,"partial":false,"time_limit":1.0,"memory_limit":524288,"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}}