#include <iostream>
#include <string>
#include <memory>
#include <sstream>

#include "Aggregator.h"
#include "SumAggregator.h"
#include "AverageAggregator.h"
#include "MinAggregator.h"

int main() {
    std::string aggregationType;
    std::cin >> aggregationType;
    std::cin.ignore();

    std::string valuesLine;
    std::getline(std::cin, valuesLine);
    std::istringstream valuesIn(valuesLine);

    StreamAggregator* aggregator;

    if (aggregationType == "sum") {
        aggregator = new SumAggregator(valuesIn);
    }
    else if (aggregationType == "average") {
        aggregator = new AverageAggregator(valuesIn);
    }
    else if (aggregationType == "min") {
        aggregator = new MinAggregator(valuesIn);
    }
    else {
        throw std::exception();      Може ли малко пояснение за този израз  ( изключение), за какво се използва ?            
    }

    std::cout << aggregator->aggregate() << std::endl;

    delete aggregator;

    return 0;
}