02. Array Modifier

#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
    int number;

    string line;
    getline(cin, line);

    istringstream stream(line);

    vector<int> numbers;

    while (stream >> number) {
        numbers.push_back(number);
        sumNumbers += number;
    }

    string command;
    cin >> command;

    int index1, index2;

    while (command != "end") {
        if (command == "decrease") {
            for (int i = 0; i < numbers.size(); i++) {
                numbers[i]--;
            }
        }
        else {
            cin >> index1 >> index2;

            if (command == "swap") {
                int value = numbers[index1];
                numbers[index1] = numbers[index2];
                numbers[index2] = value;
            }
            else {
                numbers[index1] *= numbers[index2];
            }
        }
        cin.ignore();
        cin >> command;
    }

    for (int i = 0; i < numbers.size(); i++) {
        cout << numbers[i] << (i < numbers.size() - 1 ? ", " : "");
    }
    return 0;
}