Leetcode Problem 2750. Ways to Split Array Into Good Subarrays

2750. Ways to Split Array Into Good Subarrays

Leetcode Solutions

Multiply the Differences Between Indices ofs

  1. Initialize a variable result to 1 (since we will be multiplying differences).
  2. Initialize a variable prev_index to -1 to store the index of the previous 1.
  3. Iterate through the array nums using an index i.
    • If nums[i] is 1, check if prev_index is not -1.
      • If it is not -1, multiply result by the difference (i - prev_index) and take modulo 10^9 + 7.
      • Update prev_index to the current index i.
  4. After the loop, if prev_index is still -1, return 0 as there are no 1s in the array.
  5. Otherwise, return result as the final answer.
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Prefix Sum and Counting

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