#include <iostream>

using namespace std;

int main() {

    int total=0;
    int number=0;

    const int MAX_NUMBERS=3;

    cout << "Please enter in " << MAX_NUMBERS << " numbers." << endl;

    for (int i=1;i<=MAX_NUMBERS;i++) {
        cout << "Enter #" << i << ": ";
        cin >> number;

        if(number>=0)
            total+=number;
    }

    cout << "Total: " << total << endl;

    return 0;
}