import java.io.*;
import java.util.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int m = sc.nextInt();
        int kk = sc.nextInt();
        int[] costs = new int[n];
        for (int i = 0; i < n; i++) {
            costs[i] = sc.nextInt();
        }
        long[][] distances = new long[n][n];
        for (int i = 0; i < n; i++) {
            Arrays.fill(distances[i], Long.MAX_VALUE / 2);
            distances[i][i] = 0;
        }
        for (int i = 0; i < m; i++) {
            int a = sc.nextInt() - 1;
            int b = sc.nextInt() - 1;
            int c = sc.nextInt();
            distances[a][b] = Math.min(distances[a][b], c);
            distances[b][a] = Math.min(distances[b][a], c);
        }
        for (int a = 0; a < n; a++) {
            for (int b = 0; b < n; b++) {
                for (int c = 0; c < n; c++) {
                    distances[b][c] = Math.min(distances[b][c], distances[b][a] + distances[a][c]);
                }
            }
        }
        long[] dp = new long[1 << n];
        Arrays.fill(dp, Long.MAX_VALUE);
        dp[0] = 0;
        long[] ans = new long[n + 1];
        Arrays.fill(ans, Long.MAX_VALUE);
        ans[0] = 0;
        for (int i = 1; i < (1 << n); i++) {
            int pop = getPop(i);
            for (int j = 0; j < n; j++) {
                if ((i & (1 << j)) == 0) {
                    continue;
                }
                if (pop == 1) {
                    dp[i] = costs[j];
                    break;
                }
                for (int k = 0; k < n; k++) {
                    if ((i & (1 << k)) == 0 || j == k) {
                        continue;
                    }
                    dp[i] = Math.min(dp[i], dp[i ^ (1 << j)] + distances[j][k] + costs[j]);
                }
            }
            ans[pop] = Math.min(ans[pop], dp[i]);
        }
        System.out.println(ans[kk]);
    }
    
    static int getPop(int x) {
        int pop = 0;
        while (x > 0) {
            pop += x % 2;
            x >>= 1;
        }
        return pop;
    }
}
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}