Cod sursa(job #1831928)

Utilizator madatiutiuTiutiu Madalin madatiutiu Data 19 decembrie 2016 08:22:45
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.91 kb
#include <fstream>
#include <iostream>
const int max1=15000;

using namespace std;

ifstream f("dijkstra.in");
ofstream g("dijkstra.out");

int c[200][200],d[200],t[200],p[200],n,m,s;
void citire()
{ int i,j,x,y,cost;
  f>>n>>m;
  for(i=1;i<=n;i++)
    for(j=1;j<=n;j++)
      if(i==j) c[i][j]=0;
      else c[i][j]=max1;
  for(i=1;i<=m;i++)
    { f>>x>>y>>cost;
      c[x][y]=cost;
    }
}

void dijkstra(int s)
{ int i,j,k,min1;
  for(i=1;i<=n;i++)
     { d[i]=c[s][i];
       if(i!=s && d[i]!=max1) t[i]=s;
     }
  p[s]=1;
  for(k=1;k<n;k++)
   { min1=max1;
     for(i=1;i<=n;i++)
       if(!p[i] && d[i]<min1) { min1=d[i]; j=i;
			     }
     for(i=1;i<=n;i++)
       if(!p[i])
       if(d[i]>d[j]+c[j][i])
	 { d[i]=d[j]+c[j][i];
	   t[i]=j;
	 }
     p[j]=1;
   }
   for(i=2;i<=n;i++)
    g<<d[i]<<" ";
}


int main()
 { citire();
   s=1;
   dijkstra(s);
    return 0;
}