Leetcode Problem 2103. Rings and Rods

2103. Rings and Rods

Leetcode Solutions

Using Hashmap and Set

  1. Initialize a hashmap rod_to_colors to map rod numbers to sets of colors.
  2. Iterate over the input string rings in steps of 2 to get color-position pairs.
  3. For each pair, add the color to the set corresponding to the rod number in the hashmap.
  4. Initialize a counter count to 0.
  5. Iterate over the values in the hashmap.
  6. If a set contains all three colors, increment count.
  7. Return the value of count.
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