#include <iostream>

using namespace std;

static void setup()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
}

static void run()
{
    int l, m, n;
    cin >> l >> m >> n;

    auto am = n / 25;
    n = n % 25;
    m += am;

    auto al = m / 4;
    m = m % 4;
    l += al;

    auto t = l / 10;
    l = l % 10;

    cout << l + m + n << endl;
}

int main(int argc, char **argv)
{
    setup();
    run();
    return 0;
}