#include <bits/stdc++.h>

#define lsb(x) (x & (-x))

using ull = unsigned long long;
using ll = long long;

using namespace std;



int main() {
#ifdef HOME
    ifstream cin("input.in");
    ofstream cout("output.out");
#endif
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);

    int n, a, b;
    cin >> a >> b >> n;

    if (a == b) {
        int answer = 0;
        for (int i = a; i <= n; i += a) {
            answer++;
        }
        for (int i = a - 1; i <= n; i += a) {
            answer++;
        }
        cout << answer << "\n";
        return 0;
    }

    if (a > b) {
        swap(a, b);
    }

    int offset = (n / b) * b - (n - b) - 1;
    set<int> mst;
    for (int i = 1; i <= n; i++) {
        mst.insert(i);
    }

    int answer = 0;
    int i = b;
    while (i <= n) {
        if (i % a == 0 && offset > 0) {
            offset--;
            i--;
        }
        mst.erase(i);
        answer++;
        i += b;
    }

    int pos = 0;
    while (n - pos >= a) {
        auto itr = mst.upper_bound(pos + a);
        itr--;

        pos = *itr;
        answer++;
        mst.erase(itr);
    }

    cout << answer;

    return 0;
}