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Cod sursa(job #541022)
#include<stdio.h>
#include<malloc.h>
#define INF 32000
using namespace std;
typedef struct _nod
{
int info;
int cost;
struct _nod *adr;
} nod;
typedef struct
{
struct _nod *cap;
} list;
long int n;
long int m;
int D[50001];
int S[50001];
list A[50001];
void add(int a,int b,int c)
{
nod *nou = (nod*)malloc(sizeof(nod));
nou->info = b;
nou->cost = c;
nou->adr = A[a].cap;
A[a].cap = nou;
}
void citire(void)
{
int a;
int b;
int c;
FILE *f = fopen("dijkstra.in","r");
fscanf(f,"%d %d",&n,&m);
for(int i=1;i<=m;i++)
{
fscanf(f,"%d %d %d",&a,&b,&c);
add(a,b,c);
}
fclose(f);
}
void complet(int poz)
{
nod *q = A[poz].cap;
while(q)
{
if(D[q->info] > D[poz] + q->cost)
D[q->info] = D[poz] + q->cost;
q = q->adr;
}
}
void dijkstra(void)
{
for(int i=1;i<=n;i++)
D[i] = INF;
D[1] = 0;
int nr = 0;
int poz = 1;
int minim = 0;
A[0].cap = NULL;
while(nr<n-1 && minim != INF)
{
minim = INF;
poz = 0;
for(int i=1;i<=n;i++)
if(D[i]<minim && !S[i])
{
minim = D[i];
poz = i;
}
S[poz] = 1;
if(poz) complet(poz);
nr ++;
}
}
int main()
{
FILE *f = fopen("dijkstra.out","w");
citire();
dijkstra();
for(int i=2;i<=n;i++)
if(D[i] == INF)
fprintf(f,"0 ");
else
fprintf(f,"%d ",D[i]);
fclose(f);
return 0;
}