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Cod sursa(job #967007)
#include<fstream>
#define dim 2009
using namespace std;
ifstream f("ubuntzei.in");
ofstream g("ubuntzei.out");
int a[dim][dim],n,m,k,x;
int main()
{
int r,s,t;
f>>n>>m;
f>>k;
if(k)
for(int i=1;i<=k;i++)
f>>x;
for(int i=1;i<=m;i++)
{
f>>r>>s>>t;
a[r][s]=t;
a[s][r]=t;
}
for(int k=1;k<=n;k++)
for(int i=1;i<=n;i++)
for(int j=1;j<=n;j++)
if(a[i][k]&&a[k][j]&&i!=j&&(a[i][j]>a[i][k]+a[k][j]||!a[i][j]))
a[i][j]=a[i][k]+a[k][j];
g<<a[1][n];
}