Data commit

Task/Equilibrium-index/C-sharp/equilibrium-index-1.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+class Program
+{
+    static IEnumerable<int> EquilibriumIndices(IEnumerable<int> sequence)
+    {
+        var left = 0;
+        var right = sequence.Sum();
+        var index = 0;
+        foreach (var element in sequence)
+        {
+            right -= element;
+            if (left == right)
+            {
+                yield return index;
+            }
+            left += element;
+            index++;
+        }
+    }
+
+    static void Main()
+    {
+        foreach (var index in EquilibriumIndices(new[] { -7, 1, 5, 2, -4, 3, 0 }))
+        {
+            Console.WriteLine(index);
+        }
+    }
+}

Task/Equilibrium-index/C-sharp/equilibrium-index-2.cs

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+3
+6