mirror of
https://github.com/TheAlgorithms/JavaScript.git
synced 2025-07-07 19:17:33 +08:00
Optimized the code
This commit is contained in:
@ -1,31 +1,36 @@
|
||||
/*
|
||||
* Given two sequences, find the length of longest subsequence present in both of them.
|
||||
* A subsequence is a sequence that appears in the same relative order, but not necessarily contiguous.
|
||||
* Given two sequences, find the length of longest subsequence present in both of them.
|
||||
* A subsequence is a sequence that appears in the same relative order, but not necessarily contiguous.
|
||||
* For example, “abc”, “abg”, “bdf”, “aeg”, ‘”acefg”, .. etc are subsequences of “abcdefg”
|
||||
*/
|
||||
|
||||
function longestCommonSubsequence(x, y, str1, str2, dp) {
|
||||
if (x == -1 || y == -1) return 0;
|
||||
function longestCommonSubsequence (x, y, str1, str2, dp) {
|
||||
if (x === -1 || y === -1) {
|
||||
return 0
|
||||
}
|
||||
else {
|
||||
if (dp[x][y] != 0) return dp[x][y];
|
||||
if (dp[x][y] !== 0){
|
||||
return dp[x][y]
|
||||
}
|
||||
else {
|
||||
if (str1[x] == str2[y]) {
|
||||
return dp[x][y] = 1 + longestCommonSubsequence(x - 1, y - 1, str1, str2, dp);
|
||||
if (str1[x] === str2[y]) {
|
||||
dp[x][y] = 1 + longestCommonSubsequence(x - 1, y - 1, str1, str2, dp);
|
||||
return dp[x][y]
|
||||
}
|
||||
else {
|
||||
return dp[x][y] = Math.max(longestCommonSubsequence(x - 1, y, str1, str2, dp), longestCommonSubsequence(x, y - 1, str1, str2, dp))
|
||||
dp[x][y] = Math.max(longestCommonSubsequence(x - 1, y, str1, str2, dp), longestCommonSubsequence(x, y - 1, str1, str2, dp))
|
||||
return dp[x][y]
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
function main() {
|
||||
const str1 = "ABCDGH"
|
||||
const str2 = "AEDFHR"
|
||||
function main () {
|
||||
const str1 = 'ABCDGH'
|
||||
const str2 = 'AEDFHR'
|
||||
const dp = new Array(str1.length + 1).fill(0).map(x => new Array(str2.length + 1).fill(0))
|
||||
const res = longestCommonSubsequence(str1.length - 1, str2.length - 1, str1, str2, dp)
|
||||
console.log(res);
|
||||
console.log(res)
|
||||
}
|
||||
|
||||
main()
|
||||
|
Reference in New Issue
Block a user