//first get the number of toys to distribute
            Console.WriteLine("Please enter a number of toys to distribute");
            int totaltoys = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("And how many children are we distributing toys to?");
            int childnum = Convert.ToInt32(Console.ReadLine());
            //next, we loop through the number of children to build a list of items that we can later convert to array for the calculation
            List<int> wantslist = new List<int>();
            for (int i = 0;i < childnum;i++)
            {
                Console.WriteLine("How many toys does this child want?");
                wantslist.Add(Convert.ToInt32(Console.ReadLine()));
            }
            int[] wants = wantslist.ToArray();
          
            //in this problem we are subtracting each element in the array with its neighbor and getting its positive value or absolute.
            //next, we are summing them up.
            //to solve this, we are going to get the pairwise difference which is the difference of what each child wants after recieving a toy. next, we add that up and subtract it from the total toys.
            int value = 0;
            int sum = 0;
            for (int i = 0; i < wants.Length - 1; i++)
            {
                
                   value = wants[i] - wants[i + 1];
                //make the value absolute
                value = Math.Abs(value);
                sum += value;
                
            }
            //lastly add the last value of the toys to sum
            sum += wants.Last();
            Console.WriteLine(totaltoys - sum);
        }