fn main() {
  let (n, m, _): (usize, usize, usize) = get::read_3tuple();
  
  let rs: Vec<usize> = get::read_vec();
  let rs = rs.iter().map(|r|r-1).collect::<Vec<_>>();
  
  let edges: Vec<(usize, usize, isize)> = get::read_3tuples(m);
  let edges = edges.iter().map(|&(a,b,c)|(a-1,b-1,c)).collect::<Vec<_>>();
  
  let g = Graph::new_labeled(n, &edges);
  let dist = g.warshall_floyd();
  
  let ans =
    permutations(&rs).
    iter().
    map(|r| r.windows(2).fold(0, |a,w| a + dist[w[0]][w[1]])).
    min().
    unwrap();
  
  println!("{}", ans);

}

fn permutations<T: Clone + std::fmt::Debug>(vec: &Vec<T>) -> Vec<Vec<T>> {
  fn go<T: Clone + std::fmt::Debug>(vec: &Vec<T>, n: usize, m: usize, k: usize, buf: &mut Vec<usize>, acc: &mut Vec<Vec<T>>) {
    if k == 0 {
      let r: Vec<T> = buf.iter().map(|&i| vec[i-1].clone()).collect();
      acc.push(r);
    } else {
      for x in n .. m + 1 {
        if !buf.contains(&x) {
          buf.push(x);
          go(vec, n, m, k-1, buf, acc);
          buf.pop();
        }
      }
    }
  }

  let mut acc = vec![];
  go(vec, 1, vec.len(), vec.len(), &mut vec![], &mut acc);
  acc
}

struct Graph {
  size: usize,
  adj: Vec<Vec<(usize,isize)>>
}

impl Clone for Graph {
  fn clone(&self) -> Graph {
    Graph {
      size: self.size,
      adj: self.adj.clone()
    }
  }
}

#[allow(dead_code)]
impl Graph {
  fn new_nonlabeled(n: usize, edges: &[(usize,usize)]) -> Graph {
    let mut g: Vec<Vec<(usize,isize)>> = vec![vec![]; n];
    for &(a, b) in edges {
      g[a].push((b,0));
      g[b].push((a,0));  // delete for digraph
    }
    Graph {size: n, adj: g}
  }

  fn new_labeled(n: usize, edges: &[(usize,usize,isize)]) -> Graph {
    let mut g: Vec<Vec<(usize,isize)>> = vec![vec![]; n];
    for &(a, b, c) in edges {
      g[a].push((b,c));
      g[b].push((a,c));  // delete for digraph
    }
    Graph {size: n, adj: g}
  }

  fn is_connected(&self) -> bool {
    self.dfs(0).len() == self.size
  }

  fn size(&self) -> usize {
    self.size
  }

  fn warshall_floyd(&self) -> Vec<Vec<isize>> {
    let inf = isize::max_value() >> 1;
    let mut wf: Vec<Vec<isize>> = vec![vec![inf; self.size]; self.size];
    for i in 0 .. self.size {wf[i][i] = 0}
    for (i, next) in self.adj.iter().enumerate() {
      for &(j, x) in next {
        wf[i][j] = x
      }
    }
    for k in 0 .. self.size {
      for i in 0 .. self.size {
        for j in 0 .. self.size {
          wf[i][j] = std::cmp::min(wf[i][j], wf[i][k] + wf[k][j]);
        }
      }
    }
    wf
  }

  fn coloring2(&self) -> Option<(Vec<usize>, Vec<usize>)> {
    fn paint(v: usize, p: bool, g: &Graph, cv: &mut Vec<Option<bool>>) -> bool {
      match cv[v] {
        None => {
          let next = &g.adj[v];
          cv[v] = Some(p);
          next.iter().all(|&(w,_)|paint(w,!p,g,cv))},
        Some(q) => {q == p}
      }
    }

    let mut canvas: Vec<Option<bool>> = vec![None; self.size];
    let ans = paint(0, false, self, &mut canvas);
    let bs = canvas.iter().enumerate().filter(|&(_,&v)|v==Some(false)).map(|(i,_)|i).collect::<Vec<_>>();
    let ws = canvas.iter().enumerate().filter(|&(_,&v)|v==Some(true)).map(|(i,_)|i).collect::<Vec<_>>();
    if ans {Some((bs,ws))} else {None}
  }

  fn dfs(&self, s: usize) -> Vec<usize> {
    fn go(g: &Graph, current: usize, mut path: &mut Vec<usize>, mut visited: &mut Vec<bool>) {
      for &(next, _) in &g.adj[current] {
        if visited[next] {
          continue
        } else {
          visited[next] = true;
          path.push(next);
          go(&g, next, &mut path, &mut visited)
        }
      }
    }
    let mut path = vec![s];
    let mut visited = vec![false; self.adj.len()];
    visited[s] = true;
    go(&self, s, &mut path, &mut visited);
    path
  }
  
  fn cut(&mut self, v: usize, w: usize) {
    self.adj[v].retain(|&(t,_)| t != w);
    self.adj[w].retain(|&(t,_)| t != v);
  }
}

#[allow(dead_code)]
mod get {
  use std::io::*;
  use std::str::*;

  pub fn read<T: FromStr>() -> T {
    let mut buf = String::new();
    stdin().read_line(&mut buf).ok();
    buf.trim().parse::<T>().ok().unwrap()
  }

  pub fn reads<T: FromStr>(n: usize) -> Vec<T> {
    let mut vec: Vec<T> = vec![];
    for _ in 0 .. n {
      vec.push(read());
    }
    vec
  }

  pub fn read_tuple<T1: FromStr, T2: FromStr>() -> (T1, T2) {
    let mut buf = String::new();
    stdin().read_line(&mut buf).ok();
    let mut it = buf.trim().split_whitespace();
    let x = it.next().unwrap().parse::<T1>().ok().unwrap();
    let y = it.next().unwrap().parse::<T2>().ok().unwrap();
    (x, y)
  }

  pub fn read_tuples<T1: FromStr, T2: FromStr>(n: usize) -> Vec<(T1, T2)> {
    let mut vec: Vec<(T1, T2)> = vec![];
    for _ in 0 .. n {
      vec.push(read_tuple());
    }
    vec
  }

  pub fn read_3tuple<T1: FromStr, T2: FromStr, T3: FromStr>() -> (T1, T2, T3) {
    let mut buf = String::new();
    stdin().read_line(&mut buf).ok();
    let mut it = buf.trim().split_whitespace();
    let x = it.next().unwrap().parse::<T1>().ok().unwrap();
    let y = it.next().unwrap().parse::<T2>().ok().unwrap();
    let z = it.next().unwrap().parse::<T3>().ok().unwrap();
    (x, y, z)
  }

  pub fn read_3tuples<T1: FromStr, T2: FromStr, T3: FromStr>(n: usize) -> Vec<(T1, T2, T3)> {
    let mut vec: Vec<(T1, T2, T3)> = vec![];
    for _ in 0 .. n {
      vec.push(read_3tuple());
    }
    vec
  }

  pub fn read_vec<T: FromStr>() -> Vec<T> {
    let mut buf = String::new();
    stdin().read_line(&mut buf).ok();
    buf.trim().split_whitespace().map(|t| t.parse::<T>().ok().unwrap()).collect()
  }

  pub fn read_mat<T: FromStr>(h: usize) -> Vec<Vec<T>> {
    let mut mat: Vec<Vec<T>> = vec![];
    for _ in 0 .. h {
      mat.push(read_vec());
    }
    mat
  }
}

#[allow(dead_code)]
mod put {
  use std::string::*;

  pub fn print_vec<T: ToString>(vec: &Vec<T>, sep: &str) {
    let out = vec.iter().map(|e| e.to_string()).collect::<Vec<_>>().as_slice().join(sep);
    println!("{}", out);
  }

  pub fn print_mat<T: ToString>(mat: &Vec<Vec<T>>, sep: &str) {
    for v in mat {
      print_vec(v, sep);
    }
  }
}


Measured memory_bytes: 10492