public void CheckIfExist_3()
        {
            var solution = new _1346_CheckIfNAndItsDoubleExist();
            var result   = solution.CheckIfExist(new int[] { 3, 1, 7, 11 });

            Assert.IsFalse(result);
        }
        public void CheckIfExist_1()
        {
            var solution = new _1346_CheckIfNAndItsDoubleExist();
            var result   = solution.CheckIfExist(new int[] { 10, 2, 5, 3 });

            Assert.IsTrue(result);
        }
        public void CheckIfExist_2()
        {
            var solution = new _1346_CheckIfNAndItsDoubleExist();
            var result   = solution.CheckIfExist(new int[] { 7, 1, 14, 11 });

            Assert.IsTrue(result);
        }