#include "bits/stdc++.h"
using namespace std;
#define ll long long
#define endl '\n'
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define rep2(i,a,b) for(int i=int(a);i<int(b);i++)
#define pb emplace_back
#define all(x) (x).begin(),(x).end()
int mod=1e9+7;
int mod2=998244353;
const int INF=1e9;

signed main(){
	ll a,b,c,n;
	cin>>a>>b>>c>>n;
	int ans=0;

	for(int i=0;i*a<=n;i++){
		for(int j=0;i*a+j*b<=n;j++){
			if((n-(i*a+j*b))%c==0)ans++;
		}
	}
	cout<<ans<<endl;
}

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