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Cod sursa(job #929067)
//Dijkstra complet lungimi+drumuri
//un singur varf de plecare -> start ; drumuri catre celelalte n-1 noduri
//O(n^2)
//40p infoarena
{$Q-}
program dijkkk;
type vect=array[1..5000]of longint;
mat=array[1..5000,1..5000]of longint;
const infinit=maxint;
var d,pre,m:vect;c:mat;
n,muchii,start:longint;
f,g:text;
intrare,iesire:array[1..300000] of char;
procedure initializare;
var i,j,x,y,cost:longint;
begin
readln(f,n,muchii);start:=1;
for i:=1 to n do
for j:=1 to n do begin c[i,j]:=infinit; c[j,i]:=infinit;end;
for i:=1 to muchii do begin
readln(f,x,y,cost);
c[x,y]:=cost;
end;
for i:=1 to n do begin d[i]:=c[start,i]; pre[i]:=start;end;
m[start]:=1;pre[start]:=0;
end;
procedure asfalteaza;
var i,j,dmin,vfmin:longint;
begin
for j:=1 to n do
begin
dmin:=infinit;
for i:=1 to n do
if (m[i]=0)and(dmin>d[i]) then begin
dmin:=d[i];
vfmin:=i;
end;
m[vfmin]:=1;
for i:=1 to n do
if (m[i]=0)and(d[i]>dmin+c[vfmin,i]) then
begin
pre[i]:=vfmin;
d[i]:=dmin+c[vfmin,i];
end;
end;
end;
procedure afiseaza;
var i,j,lg:longint;
dr:vect;
begin
for i:=1 to n do
if d[i]<>maxint then write(g,d[i],' ')
else write(g,'0 ');
end;
begin
assign(f,'dijkstra.in');reset(f); settextbuf(f,intrare);
assign(g,'dijkstra.out');rewrite(g);settextbuf(g,iesire);
initializare;
asfalteaza;
afiseaza;
close(f);close(g);
end.