(function ExampleOne(){
    console.log("1.Пирамида от числа");
    var input = [7,10,12,15];
    input.forEach(pyramid);

    function pyramid(input){
        var current = 1;
        var isBigger = false;
        var printCurrentline = '';
        for (let rows = 1; rows <= input; rows++) {
            for (let cols = 1; cols <= rows; cols++) {
                if(current > input){
                    isBigger = true;
                    break;
                }
                printCurrentline += current + ' ';
                current++;
            }
            console.log(printCurrentline);
                printCurrentline = '';
                if(isBigger){
                    break;
                }
        }
    }
})();

(function ExampleTwo(){
    console.log("2.Кодиране");
    var input = ['2049','9347439'];
    input.forEach(secretCode);

    function secretCode(input){
        for (let i = input.length -1; i >= 0; i--) {
            let currentDigitToNum = Number(input[i]);
            if(currentDigitToNum === 0){
                console.log('ZERO');
                continue;
            }
            let printLine = '';
            for (let n = 1; n < currentDigitToNum; n++){
                printLine += String.fromCharCode(currentDigitToNum + 33);
            }
            console.log(printLine);
        }
    }
})();

(function ExampleThree(){
    console.log("3.Еднакви суми на четни и нечетни позиции");
    var input = [[100000,100050],[123456,124000],[299900,300000]];
    input.forEach(oddAndEvenSum);

    function oddAndEvenSum(input){
        let first = input[0];
        let second = input[1];
        let printLine = '';
        for (let i = first; i <= second; i++){
            let current = '' + i;
            let oddSum = 0;
            let evenSum = 0;
            for (let j = 0; j < current.length; j++) {
                let currentDigit = current.charCodeAt(j);
                if(j % 2 == 0){
                    evenSum += currentDigit;
                }
                else{
                    oddSum += currentDigit;
                }
            }
            if(oddSum == evenSum){
                printLine += i + ' ';
            }
        }
        console.log(printLine);
    }
})();

(function ExampleFour(){
    console.log("4.Суми прости и непрости числа");
    var input = [[3,9,0,7,19,4],[30,83,33,-1,20],[0,-9,0]];
    input.forEach(primeAndNonPrimeSum);

    function primeAndNonPrimeSum(input){
        var primeSum = 0;
        var nonPrimeSum = 0;
        for (let i = 0; i < input.length; i++) {
           if(input[i] < 0){
               console.log('Number is negative');
           }
           else if(isPrime(input[i])){
                primeSum += input[i];
           }
           else{
                nonPrimeSum += input[i];
           }
        }
        console.log(`Sum of all prime numbers is: ${primeSum}`);
        console.log(`Sum of all non prime numbers is: ${nonPrimeSum}`);
        console.log('============================');

        function isPrime(num) {
            for(let i = 2, s = Math.sqrt(num); i <= s; i++)
            if(num % i === 0) return false;
            return num > 1;
        }
    }

})();

(function ExampleFive(){
    console.log('5.Train the trainers');
    var input = [['While-Loop',6.00,5.50,'For-Loop',5.84,5.66],
    ['Arrays',4.53,5.23,5.00,'Lists',5.83,6.00,5.42],
    ['Objects and Classes',5.77,4.23,'Dictionaries',4.62,5.02 ,'RegEx',2.88,3.42]];
    input.forEach(trainers);

    function trainers(input){
        var gpaArr = [];
        var topicArr = [];
        for (let i = 1; i < input.length; i++) {
            let gpaSum = 0;
            let counter = 0;
            topicArr.push(input[i-1]);
            while(typeof(input[i]) != 'string' && typeof(input[i]) != 'undefined'){
                counter++;
                gpaSum += input[i];
                i++;
            }
            gpaArr.push(gpaSum / counter);
            counter = 0;
        }
        let assessmentFinal = 0;
        for(let i = 0; i < topicArr.length; i++) {
           console.log(`${topicArr[i]} - ${gpaArr[i].toFixed(2)}`);
           assessmentFinal += gpaArr[i];
        }
        console.log(`Student's final assessment is  ${(assessmentFinal / gpaArr.length).toFixed(2)}`)
        console.log('============================');
    }
})();
(function ExampleSix(){
    console.log("6.Генератор за пароли");
    var input = [[2,4],[3,1],[3,2],[4,2]];
    input.forEach(generatePass);

    function generatePass(input){
        var n = input[0];
        var l = input[1];
        let result = '';

    for(let s1=1; s1 <= n; s1++){
        for(let s2=1; s2 <= n; s2++){
            for(let s3 = 97; s3 < 97 + l; s3++){
                for(let s4 = 97; s4 < 97 + l; s4++){
                    for(let s5=1; s5 <= n; s5++){
                        if (s5 > s1 && s5 > s2) {
                            result += '' + s1 + s2 + String.fromCharCode(s3) + String.fromCharCode(s4) + s5 + " ";
                        }
                    }
                }
            }
        }

    }
    console.log(result);
    console.log('==================');

    }
})();

(function ExampleSeven(){
    console.log("7.Специални числа");
    var input = [3,11,16];
    input.forEach(specialNumbers);

    function specialNumbers(input){
        var result = '';
        var asd = (1111 / 10) % 10;
        for (let i = 1111; i <= 9999; i++){
            if(input % (i % 10) == 0){
                if(input % (Math.floor(i/10) % 10) == 0){
                    if(input % (Math.floor(i/100) % 10) == 0){
                        if(input % (Math.floor(i/1000) % 10) == 0){
                            result += i + ' ';
                        }
                    }
                }
            }
        }
        console.log(result);
        console.log('==========================')
    }
})();