#include<iostream>
#include<cstdio>
#include<cctype>
#define gys mylove
#define maxn 10001
using namespace std;
int M,N,T,v1[maxn],v2[maxn],w1[maxn],w2[maxn],ans[maxn];
inline void in(int &x)
{
    x=0;int f=1;char t=getchar();
    while(!isdigit(t)){if(t=='-')f=-1;t=getchar();}
    while(isdigit(t)){x=x*10+t-48;t=getchar();}
    x*=f;
}
inline void input(){
	in(M);in(N);in(T);
	for(int i=1;i<=N;i++){
		in(v1[i]);in(w1[i]);in(v2[i]);in(w2[i]);
	}
}
inline void work(){
	for(int i=1;i<=N;i++){
		for(int j=M-min(w1[i],w2[i]);j>=0;j--){
			ans[j+w2[i]]=max(ans[j]+v2[i],ans[j+w2[i]]);
			ans[j+w1[i]]=max(ans[j]+v1[i],ans[j+w1[i]]);
		}
	}
	printf("%d",ans[M]+T);
}
int Main(){
	freopen("besta.in","r",stdin);
	freopen("besta.out","w",stdout);
	input();
	work();
	return 0;
}
int main(){;}
int gys=Main();