diff --git a/javascript/1143-Longest-Common-Subsequence.js b/javascript/1143-Longest-Common-Subsequence.js
index 756db3824..04bd19884 100644
--- a/javascript/1143-Longest-Common-Subsequence.js
+++ b/javascript/1143-Longest-Common-Subsequence.js
@@ -1,17 +1,16 @@
var longestCommonSubsequence = function (text1, text2) {
- let m = text1.length;
- let n = text2.length;
+ let m = text1.length,
+ n = text2.length,
+ DP = new Array(m + 1).fill(0).map(_ => new Array(n + 1).fill(0));
- let table = new Array(m + 1).fill().map(() => new Array(n + 1).fill(0));
-
- for (let i = 1; i <= m; i++) {
- for (let j = 1; j <= n; j++) {
- if (text1.charAt(i - 1) !== text2.charAt(j - 1)) {
- table[i][j] = Math.max(table[i - 1][j], table[i][j - 1]);
+ for (let x = m - 1; x >= 0; x--)
+ for (let y = n - 1; y >= 0; y--) {
+ if (text1[x] === text2[y]) {
+ DP[x][y] = 1 + DP[x + 1][y + 1];
} else {
- table[i][j] = table[i - 1][j - 1] + 1;
+ DP[x][y] = Math.max(DP[x + 1][y], DP[x][y + 1]);
}
}
- }
- return table[m][n];
-};
\ No newline at end of file
+
+ return DP[0][0];
+};
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