02. Shoot for the Win

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

using namespace std;

int main() {
    int n, index, shotTargets = 0;
    string line;
    getline(cin, line);

    istringstream stream(line);

    vector<int> targets;

    while (stream >> n) {
        targets.push_back(n);
    }

    string command;
    cin >> command;

    while (command != "End") {
        index = stoi(command);

        if (index >= 0 && index < targets.size()) {
            for (int i = 0; i < targets.size(); i++) {
                if (targets[i] != -1 && index != i) {
                    if (targets[i] > targets[index]) {
                        targets[i] -= targets[index];
                    }
                    else {
                        targets[i] += targets[index];
                    }
                }
            }
            targets[index] = -1;
            shotTargets++;
        }

        cin >> command;
    }

    cout << "Shot targets: " << shotTargets << " -> ";
    for (auto& t: targets) {
        cout << t << ' ';
    }
    return 0;
}