Leetcode Problem 1282. Group the People Given the Group Size They Belong To

1282. Group the People Given the Group Size They Belong To

Leetcode Solutions

Greedy Grouping by Size

  1. Initialize an empty list ans to store the final groups.
  2. Create a hashmap szToGroup to map group sizes to lists of indices.
  3. Iterate over the groupSizes array with index i: a. Append index i to the list szToGroup[groupSizes[i]]. b. If the size of szToGroup[groupSizes[i]] equals groupSizes[i], append the list to ans and reset szToGroup[groupSizes[i]] to an empty list.
  4. Return the list ans containing all the groups.
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Sorting and Group Formation

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