#include "bits/stdc++.h"

// Begin {{{
using namespace std;

#ifndef DEBUG
#define dump(...)
#endif

template <class A, class B> inline bool chmax(A &a, const B &b) { return b > a && (a = b, true); }
template <class A, class B> inline bool chmin(A &a, const B &b) { return b < a && (a = b, true); }

template <class T>
inline vector<T> make_v(const T &initvalue, size_t sz) {
    return vector<T>(sz, initvalue);
}

template <class T, class... Args>
inline auto make_v(const T &initvalue, size_t sz, Args... args) {
    return vector<decltype(make_v<T>(initvalue, args...))>(sz, make_v<T>(initvalue, args...));
}

constexpr int INF = 0x3f3f3f3f;
constexpr int64_t LINF = 0x3f3f3f3f3f3f3f3fLL;

constexpr size_t    operator""_sz(unsigned long long value) { return value; };
constexpr intmax_t  operator""_im(unsigned long long value) { return value; };
constexpr uintmax_t operator""_um(unsigned long long value) { return value; };
// }}} End

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int x, y, z;
    cin >> x >> y >> z;

    while (z) {
        if (x <= y) {
            x++;
        } else {
            y++;
        }
        z--;
    }

    cout << min(x, y) << "\n";

    return 0;
}