सबसे लंबे समय तक बढ़ने वाला क्रम वह क्रम है जहां एक आइटम अपने पिछले आइटम से बड़ा होता है।
यहां हम पूर्णांकों के एक सेट से सबसे लंबी बढ़ती अनुवर्ती लंबाई खोजने का प्रयास करेंगे।
Input: A set of integers. {0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15} Output: The length of longest increasing subsequence. Here it is 6. The subsequence is 0, 2, 6, 9, 13, 15.
एल्गोरिदम
longestSubSeq(subarray, n)
इनपुट :उप सरणी और उप सरणी का आकार।
आउटपुट :सबसे लंबी बढ़ती उप-अनुक्रम लंबाई।
Begin define array length of size n initially set 0 to all entries of length for i := 1 to n-1, do for j := 0 to i-1, do if subarray[j] < subarray[i] and length[j] > length[i], then length[i] := length[j] done increase length[i] by 1 done lis := 0 for i := 0 to n-1, do lis := maximum of lis and length[i] done return lis End
उदाहरण कोड
#include <iostream> using namespace std; int longestSubSeq(int subArr[], int n) { int length[n] = { 0 }; //set all length to 0 length[0] = 1; //subsequence ending with subArr[0] is 1 for (int i = 1; i < n; i++) { //ignore first character, second to all for (int j = 0; j < i; j++) { //subsequence ends with subArr[j] if (subArr[j] < subArr[i] && length[j] > length[i]) length[i] = length[j]; } length[i]++; //add arr[i] } int lis = 0; for (int i = 0; i<n; i++) // find longest increasing subsequence lis = max(lis, length[i]); return lis; } int main() { int arr[] = { 0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15 }; int n = 16; cout << "Length of Longest Increasing Subsequence is: " << longestSubSeq(arr, n); return 0; }
आउटपुट
Length of Longest Increasing Subsequence is: 6