#define _USE_MATH_DEFINES #define _CRT_SECURE_NO_WARNINGS #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; using ll = long long; using ull = unsigned long long; const ll inf = 1ll << 60; const ll mod = (ll)1e9 + 7; #define all(v) v.begin(), v.end() #define rall(v) v.rbegin(), v.rend() #define print(s) cout << s; #define println(s) cout << s << endl; #define printd(s, f) cout << fixed << setprecision(f) << s << endl; int main() { ll x, y, l; cin >> x >> y >> l; ll res = 0; if (y < 0) { res += (x < 0) ? 1 : 2; y *= -1; } if (x < 0) { res++; x *= -1; } res += ((x + l - 1) / l) + ((y + l - 1) / l); println(res); }