#include <bits/stdc++.h>
using namespace std;
#define long long int
int main() {
int n,a,b,c;
cin>>n>>a>>b>>c;
vector<int> v = {a, b, c};
sort(v.begin(), v.end());
int count=0;
for(int i=0;i<3;i++){
while(n>0){
n-=v[i];
count++;
}
}
cout<<count-1<<endl;
return 0;
}
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