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docs: improve longest_palindromic_subsequence.cpp #2467

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May 20, 2023
Merged

docs: improve longest_palindromic_subsequence.cpp #2467

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32 changes: 22 additions & 10 deletions dynamic_programming/longest_palindromic_subsequence.cpp
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
/**
* @file
* @brief Program to find the Longest Palindormic
* Subsequence of a string
* @brief Program to find the [Longest Palindormic
* Subsequence](https://www.geeksforgeeks.org/longest-palindromic-subsequence-dp-12/) of a string
*
* @details
* [Palindrome](https://en.wikipedia.org/wiki/Palindrome) string sequence of
Expand All @@ -18,8 +18,15 @@
#include <vector> /// for std::vector

/**
* Function that returns the longest palindromic
* @namespace
* @brief Dynamic Programming algorithms
*/
namespace dynamic_programming {
/**
* @brief Function that returns the longest palindromic
* subsequence of a string
* @param a string whose longest palindromic subsequence is to be found
* @returns longest palindromic subsequence of the string
*/
std::string lps(const std::string& a) {
const auto b = std::string(a.rbegin(), a.rend());
Expand Down Expand Up @@ -70,17 +77,22 @@ std::string lps(const std::string& a) {

return ans;
}
} // namespace dynamic_programming

/** Test function */
void test() {
assert(lps("radar") == "radar");
assert(lps("abbcbaa") == "abcba");
assert(lps("bbbab") == "bbbb");
assert(lps("") == "");
/**
* @brief Self-test implementations
* @returns void
*/
static void test() {
assert(dynamic_programming::lps("radar") == "radar");
assert(dynamic_programming::lps("abbcbaa") == "abcba");
assert(dynamic_programming::lps("bbbab") == "bbbb");
assert(dynamic_programming::lps("") == "");
}

/**
* Main Function
* @brief Main Function
* @returns 0 on exit
*/
int main() {
test(); // execute the tests
Expand Down