[REFACTOR] [Hacker Rank]: Warmup: Simple Array Sum. Static check issue solved.

->
src/lib/exercises/src/hackerrank/warmup/simple_array_sum.cpp:24:19: style: Consider using std::accumulate algorithm instead of a raw loop. [useStlAlgorithm]
            accum += i;
                  ^

Author: Gonzalo Diaz

src/lib/exercises/include/exercises/hackerrank/warmup/simple_array_sum.hpp

@@ -1,4 +1,3 @@
-#include <iostream>
 #include <vector>
 
 #pragma once

src/lib/exercises/src/hackerrank/warmup/simple_array_sum.cpp

@@ -4,26 +4,14 @@
  * @link Problem definition [[docs/hackerrank/warmup/simple_array_sum.md]]
  */
 
-#include <iostream>
-#include <cmath>
+#include <numeric>
 #include <vector>
 
-using namespace std;
-
-string ltrim(const string &);
-string rtrim(const string &);
-vector<string> split(const string &);
-
-
 namespace hackerrank::warmup {
 
     int simpleArraySum(const std::vector<int>& ar) {
-        int accum = 0;
-
-        for(const int i : ar)  {
-            accum += i;
-        }
-        return accum;
+        const int INIT_VALUE = 0;
+        return std::accumulate(ar.begin(), ar.end(), INIT_VALUE);
     }
 
 }

src/tests/unit/lib/hackerrank/warmup/simple_array_sum.test.cpp

@@ -1,12 +1,11 @@
 #include <catch2/catch_test_macros.hpp>
 
 #include <exercises/hackerrank/warmup/simple_array_sum.hpp>
-#include <iostream>
 #include <vector>
-
 #include <filesystem>
 #include <fstream>
 #include <nlohmann/json.hpp>
+
 using json = nlohmann::json;
 
 TEST_CASE("simpleArraySum", "[warmup]")