#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
#include <bits/stdc++.h>
using namespace std;
template<class t> inline t read(t &x){
	char c=getchar();bool f=0;x=0;
	while(!isdigit(c)) f|=c=='-',c=getchar();
	while(isdigit(c)) x=(x<<1)+(x<<3)+(c^48),c=getchar();
	if(f) x=-x;return x;
}
template<class t,class ...A> inline void read(t &x,A &...a){
	read(x);read(a...);
}
template<class t> inline void write(t x){
	if(x<0) putchar('-'),write(-x);
	else{if(x>9) write(x/10);putchar('0'+x%10);}
}

int a,b,c;

signed main(){
	read(a,b,c);
	a=max(a,b);
	write(c/a+(c%a>0));
}
#define _USE_MATH_DEFINES
#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
const int INF = 1e9;
const ll MOD = 1e9 + 7;
const ll MOD2 = 998244353;
const ll LINF = 1e18;
#define y0 y3487465
#define y1 y8687969
#define j0 j1347829
#define j1 j234892
#define next asdnext
#define prev asdprev
#define MP make_pair
#define MT make_tuple
#define F first
#define S second
#define PB push_back
#define dump(x)  cout << #x << " = " << (x) << endl;	//debug
#define SZ(x) ((ll)(x).size())
#define FOR(i, a, b) for (ll i = (a); i <= (b); i++)
#define RFOR(i, a, b) for (ll i = (a); i >= (b); i--)
#define ps(s) cout << #s << endl;
#define pv(v) cout << (v) << endl;
#define pvd(v) cout << setprecision(16) << (v) << endl;
#define ALL(a)  (a).begin(),(a).end()
#define RANGE(a, start_index, num)  (a).begin()+(start_index),(a).begin()+(num)

int main() {
	int h, w, n;
	cin >> h >> w >> n;
	int tmp = max(h, w);
	n += tmp - 1;
	int res = n / tmp;
	pv(res)
	return 0;
}