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Discussion of Problem 1203. Scientific Conference

why i got WA?????
Posted by qwt 19 Mar 2002 18:13
const
  maxn=100000;
  maxtime=30000;
var
  list:array[0..maxn,1..2] of integer;
  a:array[0..maxtime] of longint;
  v:array[0..400] of longint;
  q,max,i,j,k,n,x,y:longint;
procedure sort(x,y:longint);
var
  i,j,k,a,b:longint;
begin
  if y-x<=0 then exit;
  if y-x=1 then begin
    if (list[x,2]>list[y,2])or((list[x,2]=list[y,2])and(list[x,2]>list
[y,2])) then begin
      list[0]:=list[x];
      list[x]:=list[y];
      list[y]:=list[0];
    end;
    exit;
  end;
  k:=random(y-x)+x;
  a:=list[k,1];b:=list[k,2];
  i:=x;j:=y;
  while i<j do begin
    while ((list[i,2]<b)or((list[i,2]=b)and(list[i,1]<a)))and(i<j) do
inc(i);
    while ((list[j,2]>b)or((list[j,2]=b)and(list[j,1]>a)))and(i<j) do
dec(j);
    list[0]:=list[i];
    list[i]:=list[j];
    list[j]:=list[0];
  end;
  sort(x,i-1);sort(i+1,y);
end;

begin
  randomize;
  readln(n);
  max:=0;
  for i:=1 to n do
    readln(list[i,1],list[i,2]);
  sort(1,n);
  fillchar(a,sizeof(a),0);j:=1;fillchar(v,sizeof(v),0);
  for i:=1 to n do
    if a[list[i,2]]+v[list[i,2] div 100]<a[list[i,1]-1]+v[(list[i,1]-
1) div 100]+1 then begin
      q:=a[list[i,1]-1]+v[(list[i,1]-1) div 100]+1;
      for j:=list[i,2] to (list[i,2] div 100+1)*100-1 do a[j]:=q;
      for j:=list[i,2] div 100+1 to 400 do v[j]:=q;
    end;
  writeln(a[list[n,2]]+v[list[n,2] div 100]);
end.
As i see, you output just one number, not two. May be this is the problem...
Posted by Vladimir Milenov Vasilev 19 Mar 2002 20:50
Sorry? We should output only _one_ number, IMHO!
Posted by 3 POROSYA 21 Mar 2002 16:01
> You should output the maximal number of reports ...