Merge pull request #46 from sir-gon/feature/mini_max_sum

[Hacker Rank]: Warmup: Mini-Max Sum solved ✓

Author: sir-gon

algorithm-exercises-csharp-test/src/hackerrank/warmup/MiniMaxSum.Test.cs

@@ -0,0 +1,29 @@
+namespace algorithm_exercises_csharp.hackerrank;
+
+[TestClass]
+public class MiniMaxSumTest
+{
+  public class MiniMaxSumTestCase
+  {
+    public List<int> input = [];
+    public string expected = "";
+  }
+
+  private static readonly MiniMaxSumTestCase[] tests = [
+    new() { input = [1, 2, 3, 4, 5], expected = "10 14" },
+    new() { input = [5, 4, 3, 2, 1], expected = "10 14" }
+  ];
+
+  [TestMethod]
+  public void testMiniMaxSum()
+  {
+    string? result;
+
+    foreach (MiniMaxSumTestCase test in tests)
+    {
+      result = MiniMaxSum.miniMaxSum(test.input);
+      Assert.AreEqual(test.expected, result);
+    }
+  }
+}
+

algorithm-exercises-csharp/src/hackerrank/warmup/MiniMaxSum.cs

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+// @link Problem definition [[docs/hackerrank/warmup/solve_me_first.md]]
+
+namespace algorithm_exercises_csharp.hackerrank;
+
+using System.Diagnostics.CodeAnalysis;
+using System.Text;
+
+public class MiniMaxSum
+{
+  [ExcludeFromCodeCoverage]
+  protected MiniMaxSum() { }
+
+  public static string miniMaxSum(List<int> arr)
+  {
+    if (arr.Count == 0)
+    {
+      throw new ArgumentException("Parameter cannot be empty", nameof(arr));
+    }
+
+    int tsum = 0;
+    int tmin = arr[0];
+    int tmax = arr[0];
+
+    foreach (int value in arr)
+    {
+      tsum += value;
+
+      tmin = Math.Min(tmin, value);
+      tmax = Math.Max(tmax, value);
+    }
+
+    return string.Format("{0} {1}", tsum - tmax, tsum - tmin);
+  }
+
+}

docs/hackerrank/warmup/mini_max_sum.md

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+# [Mini-Max Sum](https://www.hackerrank.com/challenges/mini-max-sum)
+
+Difficulty: #easy
+Category: #warmup
+
+Given five positive integers, find the minimum and maximum values
+that can be calculated by summing exactly four of the five integers.
+Then print the respective minimum and maximum values as a single line
+of two space-separated long integers.
+
+## Example
+
+$ arr = [1, 3, 5, 7, 9] $
+The minimum sum is $ 1 + 3 + 5 + 7 = 16 $ and the maximum sum
+is $ 3 + 5 + 7 + 9 = 24 $. The function prints
+
+```text
+16 24
+```
+
+## Function Description
+
+Complete the miniMaxSum function in the editor below.
+miniMaxSum has the following parameter(s):
+
+- arr: an array of $ 5 $ integers
+
+## Print
+
+Print two space-separated integers on one line: the minimum sum and
+the maximum sum of 4 of 5 elements.
+
+## Input Format
+
+A single line of five space-separated integers.
+
+## Constraints
+
+$ 1 \leq arra[i] \leq 10^9 $
+
+## Output Format
+
+Print two space-separated long integers denoting the respective minimum
+and maximum values that can be calculated by summing exactly four of the
+five integers. (The output can be greater than a 32 bit integer.)
+
+## Sample Input
+
+```text
+1 2 3 4 5
+```
+
+## Sample Output
+
+```text
+10 14
+```
+
+## Explanation
+
+The numbers are $ 1, 2, 3, 4, $ and $ 5 $. Calculate the following sums using
+four of the five integers:
+
+1. Sum everything except $ 1 $, the sum is $ 2 + 3 + 4 + 5 = 14 $.
+2. Sum everything except $ 2 $, the sum is $ 1 + 3 + 4 + 5 = 13 $.
+3. Sum everything except $ 3 $, the sum is $ 1 + 2 + 4 + 5 = 12 $.
+4. Sum everything except $ 4 $, the sum is $ 1 + 2 + 3 + 5 = 11 $.
+5. Sum everything except $ 5 $, the sum is $ 1 + 2 + 3 + 4 = 10 $.
+
+**Hints**: Beware of integer overflow! Use 64-bit Integer.