using System;

using System.Collections.Generic;

​

public record TestCase(string Expression, bool Expected);

​

public class Program

{   

    // should return true is parentheses are correctly balanced in the input string

    // for example in "(5 * (2 + 6))"

    // should return false if parentheses are not correctly balanced

    // for example in "5 * ( 9 + 2 / ( 2 + 2 )"

    private static bool IsBalanced(string input) {

        return false;   

    }

    public static void Main()

    {

        var testCases = new List<TestCase>() {

            new TestCase("(5 * (2 + 6))", true),

            new TestCase("5 * ( 9 + 2 / ( 2 + 2 )", false),

            new TestCase("", true),

            new TestCase("()", true),

            new TestCase("(()())", true),

            new TestCase(")(", false),

            new TestCase("())(()", false),

        };

        RunTestCases(testCases);

    }

    private static void RunTestCases(List<TestCase> testCases) {

        int passedCases = 0;

        foreach(var testCase in testCases) {

            var result = IsBalanced(testCase.Expression);

            var passed = result == testCase.Expected;

            if (passed)

                passedCases++;

            Console.WriteLine($"{(passed ? "PASS" : "FAIL")} - expression: \"{testCase.Expression}\", expected: {testCase.Expected}, result: {result}");

        }

        if (passedCases == testCases.Count)

            Console.WriteLine("All tests passed!");

        else

            Console.WriteLine($"There are {testCases.Count - passedCases} failing cases...");

    }

}