Cod sursa(job #1733140)

Utilizator danutbodbodnariuc danut danutbod Data 23 iulie 2016 18:34:43
Problema Floyd-Warshall/Roy-Floyd Scor 50
Compilator cpp Status done
Runda Arhiva educationala Marime 0.83 kb
#include <fstream>
using namespace std;
const int inf=2e9;
int n, a[105][105];
ifstream fi("royfloyd.in");
ofstream fo("royfloyd.out");
void roy_floyd()
{
    int i, j, k;
    for (k = 1; k <= n; k++)
        for (i = 1; i <= n; i++)
            for (j = 1; j <= n; j++)
                if (i!=j && a[i][k]!=inf && a[k][j]!=inf &&
                    (a[i][j] > a[i][k] + a[k][j])) a[i][j] = a[i][k] + a[k][j];
}

int main()
{
    int i, j;
    fi>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++) if(i!=j)a[i][j]=inf;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++) fi>>a[i][j];

    roy_floyd();
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
            if(a[i][j]==inf)a[i][j]=0;
    for (i = 1; i <= n; i++)
       {
        for(j=1;j<=n;j++) fo<<a[i][j]<<" ";
        fo<<'\n';
       }
    return 0;
}