01. Counter-Strike

#include <iostream>
#include <string>

using namespace std;

int main() {
    int energy, count = 0, battleIndex;
    cin >> energy;
    cin.ignore();

    string command;
    getline(cin, command);

    while (command != "End of battle") {
        battleIndex = stoi(command);
        if (energy < battleIndex) {
            break;
        }
        count++;
        if (count % 3 == 0) {
            energy += count;
        }
        energy -= battleIndex;
        getline(cin, command);
    }

    if (command == "End of battle") {
        cout << "Won battles: " << count << ". Energy left: " << energy << endl;
    }
    else {
        cout << "Not enough energy! Game ends with " << count << " won battles and " << energy << " energy\n";
    }
    return 0;
}