type
  info=record
     s:integer;
     f:integer;
     e:integer;
  end;
var
   stu:array[1..101]of info;
   n,i,j:integer;
   temp:info;
   extra,sum:integer;
begin
   readln(n);
   for i:=1 to n do
     readln(stu[i].s,stu[i].f,stu[i].e);
   for i:=1 to n-1 do
     for j:=1 to i do
       begin
         if stu[j].s>stu[j+1].s then
            begin
               temp:=stu[j];
               stu[j]:=stu[j+1];
               stu[j+1]:=temp;
            end;
       end;
   extra:=0;
   for i:=1 to n do
     begin
        sum:=stu[i].s+stu[i].f;
        if sum>stu[i].e then
          if (sum-stu[i].e)>extra then
             extra:=sum-stu[i].e;
        if sum>stu[i+1].s then
             stu[i+1].s:=sum;
     end;
   write(extra);
   readln;
end.