Leetcode Problem 2166. Design Bitset

2166. Design Bitset

Leetcode Solutions

Flipping with Flip Flag and Counters

  1. Initialize the bitset with all bits set to 0 and the flip flag set to false.
  2. When fix is called, if the bit is not already set and the flip flag is false, or if the bit is set and the flip flag is true, increment the ones counter.
  3. When unfix is called, if the bit is set and the flip flag is false, or if the bit is not set and the flip flag is true, decrement the ones counter.
  4. When flip is called, invert the flip flag and update the ones counter to be the size of the bitset minus the current number of ones.
  5. The all operation returns true if the ones counter equals the size of the bitset.
  6. The one operation returns true if the ones counter is greater than 0.
  7. The count operation returns the value of the ones counter.
  8. The toString operation constructs the string representation by iterating over the bitset and using the flip flag to determine the value of each bit.
UML Thumbnail

Dual Representation with Lazy Flipping

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