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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. typedef long long int ll;
  4. ll go(ll n,ll a,ll b,ll c,ll *dp)
  5. {
  6. 	if(n<0) return -1;
  7. 	else if(n==0) return 0;
  8. 	else
  9. 	{
  10. 		ll &ans=dp[n];
  11. 		if(ans!=-3) return ans;
  12. 		else
  13. 		{
  14. 			ll option1 = go(n-a,a,b,c,dp);
  15. 			ll option2 = go(n-b,a,b,c,dp);
  16. 			ll option3 = go(n-c,a,b,c,dp);
  17. 			if(option1==-1&&option2==-1&&option3==-1)
  18. 			  ans=-1;
  19. 			else 
  20. 			  ans=1+max(max(option2,option3),option1);
  21. 			return ans;
  22. 		}
  23. 	}
  24. }
  25. int main()
  26. {
  27. 	ll n,a,b,c;
  28. 	cin>>n>>a>>b>>c;
  29. 	ll * dp = new ll[4010];
  30. 	for(ll i=0;i<=n;i++)
  31. 	{
  32. 		dp[i]=-3;
  33. 	}
  34. 	cout<<go(n,a,b,c,dp)<<endl;
  35.  
  36.  
  37. }
Success #stdin #stdout 0s 4444KB
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https://ideone.com/LZEfQE
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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