function repsys(input) {
    let index = 0;

    let sumAll = 0;
    let sumAllCash = 0;
    let sumAllCard = 0;
    let cashCounter = 0;
    let cardCounter = 0;

    let sum = Number(input[index]);
    index++;

    let command = input[index];
    index++;

    while (command !== "End") {
        let currentCashSum = Number(command);

        let currentCardSum = Number(input[index]);
        index++;

        if (currentCashSum >= 100) {
            console.log("Error in transaction!");
        } else {
            cashCounter++;
            sumAllCash += currentCashSum;
            sumAll += currentCashSum;
            console.log("Product sold!");
        }

        if (currentCardSum <= 10) {
            console.log("Error in transaction!");
        } else {
            cardCounter++;
            sumAllCard += currentCardSum;
            sumAll += currentCardSum;
            console.log("Product sold!");
        }

        if (sumAll >= sum) {
            console.log(`Average CS: ${(sumAllCash / cashCounter).toFixed(2)}`);
            console.log(`Average CC: ${(sumAllCard / cardCounter).toFixed(2)}`);
            break;
        }

        command = input[index];
        index++;
    }

    if (command === "End") {
        console.log("Failed to collect required money for charity.");
        //console.log(`The collected money are ${sumAll}`);
    }
}