Problem X

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    int count[3];
    int tables = 0;
    cin >> count[0] >> count[1] >> count[2];

    for (int i = 0; i < 3; i++)
    {
        tables += ceil(count[i] / 2.0);
    }
    cout << tables << endl;;
}