Leetcode Problem 1419. Minimum Number of Frogs Croaking

1419. Minimum Number of Frogs Croaking

Leetcode Solutions

Tracking Croak Sequence with Counters

  1. Initialize five counters for each character in 'croak' (c, r, o, a, k) to zero.
  2. Initialize maxFrogs to zero to keep track of the maximum number of frogs croaking simultaneously.
  3. Iterate over each character in the input string.
    • If the character is 'c', increment the 'c' counter.
    • If the character is 'r', increment the 'r' counter and check if it's greater than 'c' counter; if so, return -1.
    • Repeat the above step for 'o', 'a', and 'k', each time checking with the previous character's counter.
    • When 'k' is encountered, decrement the 'k' counter and update maxFrogs if the current number of croaking frogs is greater.
  4. After the iteration, check if all counters are equal; if not, return -1.
  5. Return maxFrogs as the minimum number of frogs needed.
UML Thumbnail

Simulating Frogs Croaking with a Queue

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