Cod sursa(job #985626)

Utilizator R4DIC4LTeodorescu Oana Maria R4DIC4L Data 17 august 2013 12:51:17
Problema Floyd-Warshall/Roy-Floyd Scor 50
Compilator cpp Status done
Runda Arhiva educationala Marime 0.93 kb
#include <fstream>
using namespace std;
ifstream f("royfloyd.in");
ofstream g("royfloyd.out");
int i, j, k, n, w[101][101], d[101][101];
int main ()
{
    f >> n;
    for(i = 1; i <= n; ++ i)
        for(j = 1; j <= n; ++ j)
        {
            f >> w[i][j];
            if(i == j)
                d[i][j] = 0;
            else
                d[i][j] = w[i][j];
        }
    /// MinDist(i, j, 0) = w[i][j]
    /// MinDist(i, j, k + 1) = min( MinDist(i, j, k), MinDist(i, k + 1, k) + MinDist(k + 1, j, k) )
    for(k = 1; k <= n; ++ k)
        /// cea mai mica distanta intre nodurile i si j folosind k muchii
        for(i = 1; i <= n; ++ i)
            for(j = 1; j <= n; ++ j)
                if(d[i][k] + d[k][j] < d[i][j])
                    d[i][j] = d[i][k] + d[k][j];
    for(i = 1; i <= n; ++ i)
    {
        for(j = 1; j <= n; ++ j)
            g << d[i][j] << " ";
        g << "\n";
    }
    return 0;
}