Autonomy

#include <iostream>
#include <string>
using namespace std;
                                // Autonomy

int main()
{
    string s;
    int a, b, c;
    cin >> a >> b >> c;
    int v = a * b * c;
    getline(cin, s);
    int count = 0;
    for (;;)
    {
        getline(cin, s);
        if (s == "Done") break;
        count = count + stoi(s);
        if (count > v)
        {
            printf("No more free space! You need %d Cubic meters more.\n", count - v);
            return 0;
        }
    }
    printf("%d Cubic meters left.\n", v - count);
    return 0;
}