* ![image](https://assets.leetcode.com/users/images/2c81c4ff-1d3a-4d3f-858c-7769d02a5044_1608906872.8702393.png)\nabove picture shows that I can\'t see what is wrong with my code due to the scroll bar missing, instead, I can only check the error by the developer tools\n* ![image](https://assets.leetcode.com/users/images/99b92206-2e3c-4125-a052-c3f42b53a3cd_1608907113.4077067.png)\n\n\n\n

\nabove picture shows that I can\'t see what is wrong with my code due to the scroll bar missing, instead, I can only check the error by the developer tools\n* 