Python | Self-Inspired | Only work on Leetcode testcases.
\nfrom itertools import combinations\nclass Solution:\n    def minSessions(self, tasks: List[int], sessionTime: int) -> int:\n        \n        tasks.sort()\n  
```\nfrom itertools import combinations\nclass Solution:\n    def minSessions(self, tasks: List[int], sessionTime: int) -> int:\n        \n        tasks.sort()\n        \n        ans = 0\n        i=1\n        \n        while tasks and i<=len(tasks): #get rid of all possible combination that results in sessionTime\n            comb = combinations(tasks, i)\n \n            for pairs in list(comb):\n                if sum(pairs) == sessionTime:\n                    for val in pairs:\n                        tasks.remove(val)\n                    \n                    i=1\n                    ans+=1\n                    break\n            \n            i+=1\n            \n        while tasks: #for the remaining that is not perfect, selecting from the greatest to lowest\n            quota = sessionTime\n            ans+=1\n            \n            while quota > 0:\n                i = bisect.bisect_right(tasks, quota) #right most item greater than quota\n                if tasks and tasks[i-1] <= quota:\n                    quota -= tasks.pop(i-1)\n                else:\n                    quota = -1\n        \n        return ans\n```
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