ctf24.cs

           int[] array = new int[]
				{
					1,
					7,
					16,
					11,
					14,
					19,
					20,
					18
				};
            int[] array2 = new int[]
					{
						85,
						111,
						117,
						43,
						104,
						127,
						117,
						117,
						33,
						110,
						99,
						43,
						72,
						95,
						85,
						85,
						94,
						66,
						120,
						98,
						79,
						117,
						68,
						83,
						64,
						94,
						39,
						65,
						73,
						32,
						65,
						72,
						51
					};
            string text = "";
            for (int j = 0; j < array2.Length; j++) {
                text += (char)(array2[j] ^ array[j % array.Length]);
            }
            MessageBox.Show(text);