<details> \n  <summary>Q1</summary>\n\n![image](https://assets.leetcode.com/users/monica12/image_1571439514.png)\n![image](https://assets.leetcode.com/users/monica12/image_1571439519.png)\n</details>\n\n<details> \n  <summary>Q2</summary>\n\n![image](https://assets.leetcode.com/users/monica12/image_1571439580.png)\n</details>\n\n

 \n  Q1\n\n![image](https://assets.leetcode.com/users/monica12/image_1571439514.png)\n![image](https://assets.leetcode.com/users/monica12/image_1571439519.png)\