Leetcode Problem 2486. Append Characters to String to Make Subsequence

2486. Append Characters to String to Make Subsequence

Leetcode Solutions

Two Pointer Approach

  1. Initialize two pointers, sp for string s and tp for string t, starting at 0.
  2. Initialize a counter c to keep track of the matching characters.
  3. Iterate through string s using the sp pointer. a. If s[sp] equals t[tp], increment both sp and tp, and increment the counter c. b. If they do not match, only increment sp.
  4. Continue the iteration until sp reaches the end of s.
  5. The number of characters to append is the length of t minus the counter c.
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Mark and Count Approach

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