diff --git a/main.cpp b/main.cpp
index 39d17e2..7b58475 100644
--- a/main.cpp
+++ b/main.cpp
@@ -140,30 +140,47 @@ 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--;
+		}
+		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 max = array[i];
+		int max_idx = i;
+		for (unsigned int j = i + 1; j < size; j++)
+		{
+          if( array[j] > max) {
+            max = array[j];
+            max_idx = j;
+          }
+
+		}
+		swap(array[i], array[max_idx]);
 	}
 }