public void CountPairsTest(int[] inp_array, int output, int Target = 4)
        {
            var res = Task4.CountPairs(inp_array, Target);

            Assert.AreEqual(res, output);
        }
        public void NumberOfPairsTest(int[] input_array, int output, int turgetnumber = 5)
        {
            var res = Task4.NumberOfPairs(input_array, turgetnumber);

            Assert.AreEqual(res, output);
        }