Cod sursa(job #525763)

Utilizator unudoitreiRusu Alexandru unudoitrei Data 26 ianuarie 2011 08:28:13
Problema Floyd-Warshall/Roy-Floyd Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 1.14 kb
/*for i = 1 to N
   for j = 1 to N
      if there is an edge from i to j
         dist[0][i][j] = the length of the edge from i to j
      else
         dist[0][i][j] = INFINITY
  
for k = 1 to N
   for i = 1 to N
      for j = 1 to N
         dist[k][i][j] = min(dist[k-1][i][j], dist[k-1][i][k] + dist[k-1][k][j])
*/
		 
#include<stdio.h>
#define oo 1005
#define dim 105

using namespace std;

int A[dim][dim], dist[dim][dim][dim],i,j,k,n;

int minim(int a,int b)
{	if(a<b) return a;
	return b;}

int main()
{
	FILE *f=fopen("royfloyd.in","r"), *g=fopen("royfloyd.out","w");
	
fscanf(f,"%d",&n);

for(i=1;i<=n;i++)
	for(j=1;j<=n;j++)
		fscanf(f,"%d",&A[i][j]); //costul muchiei de i la j in graf	
	
for(i=1;i<=n;i++)
	for(j=1;j<=n;j++)
		if(A[i][j])
			dist[0][i][j]=A[i][j];
		else dist[0][i][j]=oo;
		
for(k=1;k<=n;k++)		
	for(i=1;i<=n;i++)
		for(j=1;j<=n;j++)		
		dist[k][i][j]=minim( dist[k-1][i][j], dist[k-1][i][k]+ dist[k-1][k][j]);
		
for(i=1;i<=n;i++)
	dist[n][i][i]=0;

for(i=1;i<=n;i++)
	{for(j=1;j<=n;j++)
		fprintf(g,"%d ",dist[n][i][j]);
		fprintf(g,"\n");}
	
fclose(f);
fclose(g);

return 0;
}