diff --git a/main.cpp b/main.cpp
index 39d17e2..39a78ee 100644
--- a/main.cpp
+++ b/main.cpp
@@ -139,33 +139,48 @@ void swap(int& a, int& b) {
 
 void bubble_sort_descending(int* array, unsigned int size) {
     for (unsigned int i = 0; i < size - 1; i++)
-    {
-        //#######################################################
-        //Implement here
-        ;
-        //#######################################################
-    }
+    for (unsigned int j = 0; j < size - 1 - i; j++)
+		{
+			if (array[j] < array[j + 1])
+			{ 
+            int temp;
+            temp = array[j];
+            array[j] = array[j + 1];
+            array[j + 1] = temp;
+            }
+		}
 }
 
 void insertion_sort_descending(int* array, unsigned int size) {
 	for (unsigned int i = 1; i < size; i++)
 	{
-		//#######################################################
-        //Implement here
-        ;
-        //#######################################################
+		int temp = array[i];
+		int j = i - 1;
+		while(1)
+		{
+        if (j<0) break;
+        if (array[j] >= temp) break;
+        array[j + 1] = array [j];
+        j = j - 1;
+		}
+		array[j + 1] = temp;
 	}
 }
 
 void selection_sort_descending(int* array, unsigned int size) {
 	for (unsigned int i = 0; i < size - 1; i++)
 	{
-		//#######################################################
-        //Implement here
-        ;
-        //#######################################################
+		int min = array[i];
+		int min_idx = i;
+		for (unsigned int j = i + 1; j < size; j++)
+		{
+        if (array[j] > min) {
+        min = array[j];
+        min_idx = j;
+        }
+		}
+		swap(array[i], array[min_idx]);
 	}
-}
-
+    }