deploy: 57ea7b1f9d

combsort.cpp

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+//Kind of better version of Bubble sort.
+//While Bubble sort is comparering adjacent value, Combsort is using gap larger than 1
+//Best case: O(n)
+//Worst case: O(n ^ 2)
+
+#include <iostream>
+
+using namespace std;
+
+int a[100005];
+int n;
+
+int FindNextGap(int x)
+{
+    x = (x * 10) / 13;
+
+    return max(1, x);
+}
+
+void CombSort(int a[], int l, int r)
+{
+    //Init gap
+    int gap = n;
+
+    //Initialize swapped as true to make sure that loop runs
+    bool swapped = true;
+
+    //Keep running until gap = 1 or none elements were swapped
+    while (gap != 1 || swapped)
+    {
+        //Find next gap
+        gap = FindNextGap(gap);
+
+        swapped = false;
+
+        // Compare all elements with current gap
+        for (int i = l; i <= r - gap; ++i)
+        {
+            if (a[i] > a[i + gap])
+            {
+                swap(a[i], a[i + gap]);
+                swapped = true;
+            }
+        }
+    }
+}
+
+int main()
+{
+    cin >> n;
+    for (int i = 1; i <= n; ++i)
+        cin >> a[i];
+
+    CombSort(a, 1, n);
+
+    for (int i = 1; i <= n; ++i)
+        cout << a[i] << ' ';
+    return 0;
+}