<details>\n<summary> Q1 : Even-Odd Operations </summary>\n\n![image](https://assets.leetcode.com/users/deepakps22/image_1582275446.png)\n\n![image](https://assets.leetcode.com/users/deepakps22/image_1582275453.png)\n\n![image](https://assets.leetcode.com/users/deepakps22/image_1582275459.png)\n\n![image](https://assets.leetcode.com/users/deepakps22/image_1582275466.png)\n\n</details>\n<details>\n<summary> Q2 : Substring Calculator </summary>\n\n\n**Substring Calculator**\n\n\n![image](https://assets.leetcode.com/users/deepakps22/image_1582275668.png)\n\n![image](https://assets.leetcode.com/users/deepakps22/image_1582275677.png)\n\n![image](https://assets.leetcode.com/users/deepakps22/image_1582275685.png)\n\n![image](https://assets.leetcode.com/users/deepakps22/image_1582275691.png)\n\n</details>\n\n\n\n

\n Q1 : Even-Odd Operations \n\n![image](https://assets.leetcode.com/users/deepakps22/image_1582275446.png)\n\n![image](https://assets.leetcode.com/users/deepak