/SVOI - Chuẩn bị SVOI (OLP Không chuyên 2010)

              Uses Crt;
        Var a,b,c,d:array[1..1000] of longint;
            t,p,n,i,j,res:longint;
        Begin
            readln(n,t,p);
            for i:=1 to n do read(a[i],b[i],c[i],d[i]);
            for i:=1 to n do
             for j:=1 to n do
              if (t>=a[j]) and (p>=b[j]) and (a[j]>-1) and (b[j]>-1) then
              begin
                  t:=t+c[j];
                  p:=p+d[j];
                  a[j]:=-1; b[j]:=-1;
                  inc(res);
              end;
            writeln(res);
            readln;
        End.