n, a, b, c = map(int, input().split())
ans = [-10**5] * (n + c + b + a)
ans[0] = 0
for i in range(n):
ans[i + a] = max(ans[i] + 1, ans[i + a])
ans[i + b] = max(ans[i] + 1, ans[i + b])
ans[i + c] = max(ans[i] + 1, ans[i + c])
print(ans[n])
#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define fr(a,b) for(int i = a; i < b; i++)
#define frr(a,b) for(int i = a; i >= b; i--)
#define rep(i,a,b) for(int i = a; i < b; i++)
#define mod 1000000007
#define inf (1LL<<60)
#define all(x) (x).begin(), (x).end()
#define triplet pair<ll,pair<ll,ll>>
#define fast_io ios_base::sync_with_stdio(false);cin.tie(NULL)
#define precise(x,y) cout<<fixed<<setprecision(y)<<x
using namespace std;
int M = 1e9 + 7;
int solve(int i, int target, vector<int>& v, vector<vector<int>>& dp){
if(target==0) return 0;
if(i<0) return INT_MIN;
if(dp[i][target]!=-1) return dp[i][target];
int not_take = solve(i-1,target,v,dp);
int take = INT_MIN;
if(target-v[i]>=0) take = 1 + solve(i,target-v[i],v,dp);
return dp[i][target] = max(take,not_take);
}
int main(){
int n;
cin>>n;
vector<int> v(3);
fr(0,3) cin>>v[i];
vector<vector<int>> dp(3,vector<int>(n+1,-1));
int ans = solve(2,n,v,dp);
cout<<ans<<"\n";
return 0;
}1200. Minimum Absolute Difference | 1619B - Squares and Cubes |
1619A - Square String | 1629B - GCD Arrays |
1629A - Download More RAM | 1629C - Meximum Array |
1629D - Peculiar Movie Preferences | 1629E - Grid Xor |
1629F1 - Game on Sum (Easy Version) | 2148. Count Elements With Strictly Smaller and Greater Elements |
2149. Rearrange Array Elements by Sign | 2150. Find All Lonely Numbers in the Array |
2151. Maximum Good People Based on Statements | 2144. Minimum Cost of Buying Candies With Discount |
Non empty subsets | 1630A - And Matching |
1630B - Range and Partition | 1630C - Paint the Middle |
1630D - Flipping Range | 1328A - Divisibility Problem |
339A - Helpful Maths | 4A - Watermelon |
476A - Dreamoon and Stairs | 1409A - Yet Another Two Integers Problem |
977A - Wrong Subtraction | 263A - Beautiful Matrix |
180C - Letter | 151A - Soft Drinking |
1352A - Sum of Round Numbers | 281A - Word Capitalization |