Create 476.cpp

476.cpp

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+// C++ program of above approach
+#include<bits/stdc++.h>
+using namespace std;
+
+// A utility function to get max of two integers
+int max (int x, int y) { return (x > y)? x : y; }
+
+// Returns the length of the longest palindromic subsequence in seq
+int lps(char *seq, int i, int j)
+{
+// Base Case 1: If there is only 1 character
+if (i == j)
+	return 1;
+
+// Base Case 2: If there are only 2
+// characters and both are same
+if (seq[i] == seq[j] && i + 1 == j)
+	return 2;
+
+// If the first and last characters match
+if (seq[i] == seq[j])
+	return lps (seq, i+1, j-1) + 2;
+
+// If the first and last characters do not match
+return max( lps(seq, i, j-1), lps(seq, i+1, j) );
+}
+
+/* Driver program to test above functions */
+int main()
+{
+	char seq[] = "GEEKSFORGEEKS";
+	int n = strlen(seq);
+	cout << "The length of the LPS is "
+		<< lps(seq, 0, n-1);
+	return 0;
+}