516.js

/** ------------------------------------------------------------------------------
 * 
 * 2023-04-14
 * 516. Longest Palindromic Subsequence
 * https://leetcode.com/problems/longest-palindromic-subsequence/description/
 * 
 ------------------------------------------------------------------------------ */
/**
 * @param {string} s
 * @return {number}
 */
var longestPalindromeSubseq = function (s) {
  const n = s.length;

  const dp = Array(n).fill(1);

  for (let i = n - 2; i >= 0; i--) {
    console.log(dp);
    let count = 0;
    for (let j = i + 1; j < n; j++) {
      const temp = dp[j];
      if (s[i] === s[j]) {
        dp[j] = count + 2;
      } else {
        dp[j] = Math.max(dp[j], dp[j - 1]);
      }

      count = temp;
    }
  }

  console.log("dp", dp);

  return dp[dp.length - 1];
};

console.log(longestPalindromeSubseq("aaaaa"));