ID,Title,Acceptance,Difficulty,Frequency,Leetcode Question Link 1359,Count All Valid Pickup and Delivery Options,57.9%,Hard,0.261487798668764, https://leetcode.com/problems/count-all-valid-pickup-and-delivery-options 695,Max Area of Island,62.7%,Medium,0.22890365856149725, https://leetcode.com/problems/max-area-of-island 759,Employee Free Time,66.3%,Hard,0.16790196801661988, https://leetcode.com/problems/employee-free-time 1229,Meeting Scheduler,52.7%,Medium,0.09305870395398054, https://leetcode.com/problems/meeting-scheduler 37,Sudoku Solver,43.6%,Hard,0.01821543989134118, https://leetcode.com/problems/sudoku-solver 227,Basic Calculator II,36.9%,Medium,0.01239941490503826, https://leetcode.com/problems/basic-calculator-ii 56,Merge Intervals,39.3%,Medium,0.0034728286335985107, https://leetcode.com/problems/merge-intervals 210,Course Schedule II,40.7%,Medium,0.0019086707135282834, https://leetcode.com/problems/course-schedule-ii