02. Report System

#include <iostream>
#include <string>

using namespace std;

int main() {
    int neededSum, cashSum = 0, cardSum = 0, cashCount = 0, cardCount = 0, counter = 0;
    cin >> neededSum;

    string command;
    cin >> command;

    while (command != "End") {

        int sumTransaction = stoi(command);

        if (counter % 2 == 0 && sumTransaction > 0 && sumTransaction <= 100) {
            neededSum -= sumTransaction;
            cashSum += sumTransaction;
            cout << "Product sold!\n";
            cashCount++;
        }
        else if (counter % 2 == 1 && sumTransaction >= 10) {
            neededSum -= sumTransaction;
            cardSum += sumTransaction;
            cout << "Product sold!\n";
            cardCount++;
        }
        else {
            cout << "Error in transaction!\n";
        }

        if (neededSum <= 0) {
            break;
        }

        counter++;
        cin >> command;
    }

    if (command == "End") {
        cout << "Failed to collect required money for charity.\n";
    }
    else {
        printf("Average CS: %.2f\nAverage CC: %.2f\n", 1.0 * cashSum / cashCount, 1.0 * cardSum / cardCount);
    }

    return 0;
}