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  1. Prepare
  2. Algorithms
  3. Implementation
  4. Sales by Match
  5. Discussions

Sales by Match

  • ErikE
     + 1 comment

    Why check contains when add does the same thing, returning false when the item is already in the set? That makes it a lot simpler:

    if (!colors.add(c[i])) {
   pairs++;
   colors.remove(c[i]);
}