Update longest_increasing_subsequence.cpp

Gyanachand1 · Dec 9, 2022 · efda0eb · efda0eb
1 parent 456f323
commit efda0eb
Showing 1 changed file with 19 additions and 1 deletion.
diff --git a/cpp/neetcode_150/13_1-d_dynamic_programming/longest_increasing_subsequence.cpp b/cpp/neetcode_150/13_1-d_dynamic_programming/longest_increasing_subsequence.cpp
@@ -17,7 +17,7 @@
  Time: O(n^2)
  Space: O(n)
 */
-
+/*
 class Solution {
 public:
  int lengthOfLIS(vector<int>& nums) {
@@ -38,3 +38,21 @@ class Solution {
  return result;
  }
 };
+*/
+
+class Solution {
+public:
+ int lengthOfLIS(vector<int>& nums) {
+ int n = nums.size();
+ vector<int> LIS(n, 1);
+
+ for (int i = n - 1; i >= 0; --i){
+ for (int j = i + 1; j < n; ++j){
+ if (nums[i] < nums[j])
+ LIS[i] = max(LIS[i], 1 + LIS[j]);
+ }
+ }
+
+ return *max_element(LIS.begin(), LIS.end());
+ }
+};