count, if total is 24 at all line in permutation.

PermutationBowlCount

count, if total is 24 at all line in permutation.

Program.cs

using System;
using System.Text;
using System.Collections.Generic;

class Programs {
	delegate TResult Func<T, TResult>(T t);

	static void Main(){
		int cnt = 0;
		
		cnt = calc(new int[]{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, new int[0], delegate(int[] list){
			//       [0]
			//     [1] [2]
			//   [3] [4] [5]
			// [6] [7] [8] [9]
			int[] total = new int[] {
				list[0] + list[1] + list[3] + list[6],
				list[0] + list[2] + list[5] + list[9],
				list[6] + list[7] + list[8] + list[9],
			};
			bool f = true;
			for(int i = 0; i < total.Length; i++ ){
				f &= total[i] == 24; 
			}

			if(f) {
				StringBuilder sb = new StringBuilder();
				for(int i = 0; i < total.Length; i++ ){
					if(sb.Length > 0) {
						sb.Append(",");
					}
					sb.Append(total[i]);
				}
				Console.WriteLine("");
				Console.WriteLine(string.Format("[f({0}), total({1})]", new object[]{f, sb.ToString(), }));
				Console.WriteLine(string.Format("      {0,3} ", new object[]{list[0], }));
				Console.WriteLine(string.Format("   {0,3} {1,3} ", new object[]{list[1], list[2], }));
				Console.WriteLine(string.Format(" {0,3} {1,3} {2,3} ", new object[]{list[3], list[4], list[5], }));
				Console.WriteLine(string.Format("{0,3} {1,3} {2,3} {3,3}", new object[]{list[6], list[7], list[8], list[9], }));
				Console.WriteLine();
				return 1;
			} else {
				Console.Write(".");
				return 0;
			}
		});

		Console.WriteLine("");
		Console.WriteLine("Hellow C#");
		Console.WriteLine("cnt = " + cnt);
	}
	static int calc(int[] src, int[] tgt, Func<int[], int> func) {
		if(src.Length == 0) {
			return func(tgt);
		} else {
			int ret = 0;
			for(int i = 0; i < src.Length; i++) {
				List<int> srcList = new List<int>(src);
				List<int> tgtList = new List<int>(tgt);
				srcList.RemoveAt(i);
				tgtList.Add(src[i]);
				ret += calc(srcList.ToArray(), tgtList.ToArray(), func);
			}
			return ret;
		}
	}
}