|
|
back to boardHow to check wheter the necrologue's length is less than 1,000,000 without recursion or just not to get MLE ??? Posted by uuuuuuu 31 Mar 2003 00:36 Look inside (+) DFS modification works very good!: b[i] = 0 when this necrologue was not visited. = 1 when necrologue is beeing processed = 2 when necrologue was processed. TextLen[i] = Length of i-th necrologue. Text[i][j] - j-th letter of i-th necrologue. 1. b[i] = 0, TextLen[i] = 0; for all necrologues i. 2. We call DFS_Visit(1); 1. DFS_Visit(v) v - necrologue 2. b[v] = 1 We are processing this necro 3. TextLen[v] = 0 Just in case 4. Sequently for all character s = 1, 2, 3, ... 5. If this is character of necro. increase TextLen[v] by 1 6. If this is link to other necro (say u) then do next 7. If b[u] = 1 then we gone to a loop write answer and exit 8. If b[u] = 2 then we already processed necro u and we know TextLen[u], so we can increase TextLen[v] by TextLen[u]. 9. If b[u] = 0 then we call DFS_Visit(u) and if it returned increase TextLen[v] by TextLen[u]. 10. b[v] = 0; With each increase of TextLen we must check wether it becomes greater than 1 000 000 if so Stop execution. Thank you ! Posted by uuuuuuu 31 Mar 2003 19:59 now TLE :(( -> how to do with the 1 sec time limit ? Posted by uuuuuuu 31 Mar 2003 20:31 i just do the dfs and then i write the answer with the recursion... but always TLE Could you show your code ?? Here it is ... var n:array[1..9,0..1001]of char; b:array[1..9]of byte; textlen:array[1..9]of longint; wypisane,ile:longint; procedure wczytaj; var i,k:longint; zn:char; zb:text; begin {assign(zb,'1253.in'); reset(zb);} readln({zb,}ile); for i:=1 to ile do begin k:=0; read({zb,}zn); while zn<>'#'do begin inc(k); n[i,k]:=zn; read({zb,}zn) end; inc(k); n[i,k]:='#'; readln{(zb)} end; {close(zb)} end; procedure dzialaj(x:longint); var i,kt:longint; zn:char; begin i:=1; zn:=n[x,i]; while zn<>'#'do begin if zn='*' then begin kt:=ord(n[x,i+1])-48; i:=i+2; dzialaj(kt) end else begin write(zn); inc(i) end; zn:=n[x,i]; end; end; procedure koniec; begin writeln('#'); halt end; procedure dfsvisit(v:byte); var zn:char; i:integer; begin b[v]:=1; i:=1; textlen[v]:=0; zn:=n[v,i]; while zn<>'#'do begin if ((ord(zn)-48)>0)and((ord(zn)-48)<10)and(n[v,i-1]='*')then begin if b[ord(zn)-48]=1 then begin writeln('#'); halt end else if b[ord(zn)-48]=2 then begin textlen[v]:=textlen[v]+textlen[ord(zn)-48]; if textlen[v]>1000000 then koniec end else if b[ord(zn)-48]=0 then begin dfsvisit(ord(zn)-48); textlen[v]:=textlen[v]+textlen[ord(zn)-48]; if textlen[v]>1000000 then koniec end; inc(i) end else if zn='*'then inc(i) else begin inc(textlen[v]); if textlen[v]>1000000 then koniec; inc(i) end; zn:=n[v,i] end; b[v]:=2; end; procedure dfs; begin fillchar(b,sizeof(b),0); fillchar(textlen,sizeof(textlen),0); dfsvisit(1) end; begin wczytaj; dfs; dzialaj(1); end. I know what's wrong know:(+) It's the "return symbol". In C/C++ "return symbol" is '\n', it is just 1 byte. But in Pascal "return symbol" is #13#10, it is 2 byte. My program made the same mistake as your :-) Good Luck! Sorry, the post is wrong. I shall not post it here. > It's the "return symbol". > In C/C++ "return symbol" is '\n', it is just 1 byte. > But in Pascal "return symbol" is #13#10, it is 2 byte. > > My program made the same mistake as your :-) > Good Luck! |
|
|