Data commit

Task/Permutation-test/C-sharp/permutation-test.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+
+namespace PermutationTest {
+    class Program {
+        static readonly List<int> DATA = new List<int>{
+            85, 88, 75, 66, 25, 29, 83, 39, 97,
+            68, 41, 10, 49, 16, 65, 32, 92, 28, 98
+        };
+
+        static int Pick(int at, int remain, int accu, int treat) {
+            if (remain == 0) {
+                return (accu > treat) ? 1 : 0;
+            }
+            return Pick(at - 1, remain - 1, accu + DATA[at - 1], treat)
+                + ((at > remain) ? Pick(at - 1, remain, accu, treat) : 0);
+        }
+
+        static void Main() {
+            int treat = 0;
+            double total = 1.0;
+            for (int i = 0; i <= 8; i++) {
+                treat += DATA[i];
+            }
+            for (int i = 19; i >= 11; i--) {
+                total *= i;
+            }
+            for (int i = 9; i >= 1; --i) {
+                total /= i;
+            }
+            int gt = Pick(19, 9, 0, treat);
+            int le = (int) (total - gt);
+            Console.WriteLine("<= {0}%  {1}", 100.0 * le / total, le);
+            Console.WriteLine(" > {0}%  {1}", 100.0 * gt / total, gt);
+        }
+    }
+}