1 Problem 1 : Report Contiguos Dates (https://leetcode.com/problems/report-contiguous-dates/ )
2 Problem 2 : Student Report By Geography (https://leetcode.com/problems/students-report-by-geography/ )
3 Problem 3 : Average Salary Department vs Company (https://leetcode.com/problems/average-salary-departments-vs-company/solution/ )
4 Problem 4 : Game Play Analysis I (https://leetcode.com/problems/game-play-analysis-i/ )