#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using PII = std::pair<int, int>;
using PLL = std::pair<ll, ll>;

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)


int main()
{

#ifdef DEBUG
    cout << "DEBUG MODE" << endl;
    ifstream in("input.txt"); //for debug
    cin.rdbuf(in.rdbuf());    //for debug
#endif

    int x, y, r;
    cin >> x >> y >> r;

    x = abs(x);
    y = abs(y);
    
    rep(i, 200)
    {
        if ( (x + y - i - 1) / sqrt(2.0) <= -r && (x + y - i) / sqrt(2.0) > -r )
            cout << i + 1 << endl;
    }


    return 0;
}