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Dijkshtra.java

@@ -0,0 +1,38 @@
+public static void main(String[] args) throws IOException {
+	  Reader in=new Reader();
+	  int t1=in.nextInt();
+        for(int gj=0;gj<t1;gj++)
+	{
+        int n=in.nextInt();
+        int m=in.nextInt();
+        long w[][]=new long [n+1][n+1];
+        for (long[] row: w)
+            Arrays.fill(row, 1000000l);
+         for(int i=0;i<m;i++){
+             int x=in.nextInt(),y=in.nextInt();
+             long cmp=in.nextLong();
+             if(w[x][y]>cmp){
+            	w[x][y]=cmp; w[y][x]=cmp;
+             }
+	}
+         Stack <Integer> t=new Stack<Integer>();
+          int src=in.nextInt();
+        for(int i=1;i<=n;i++){
+        	if(i!=src){t.push(i);}}
+        Stack <Integer> p=new Stack<Integer>();
+        p.push(src);
+        w[src][src]=0;
+         while(!t.isEmpty()){int min=989997979,loc=-1;
+        for(int i=0;i<t.size();i++){
+        	w[src][t.elementAt(i)]=Math.min(w[src][t.elementAt(i)],w[src][p.peek()]
+                +w[p.peek()][t.elementAt(i)]);
+            if(w[src][t.elementAt(i)]<=min){
+            	min=(int) w[src][t.elementAt(i)];loc=i;}
+        }
+        p.push(t.elementAt(loc));t.removeElementAt(loc);}
+         for(int i=1;i<=n;i++){
+        	 if(i!=src && w[src][i]!=1000000l){System.out.print(w[src][i]+" ");}
+        	 else if(i!=src){System.out.print("-1"+" ");}
+         }System.out.println();
+         }
+  }