#include <iostream>
#include<fstream>
#include<vector>
using namespace std;
int main(){
    ifstream in;
    ofstream ou;
    in.open("input.txt");
    ou.open("output.txt");
    int n;
    in>>n;
    int lati;
    in>>lati;
    int array[n];
    int visitato[n];
    for(int i=0;i<n;i++){
        in>>array[i];
        visitato[i]=0;
    }
    vector<int> v[n];
    int a,b;
    for(int i=0;i<lati;i++){
       in>>a;
       in>>b;
       v[a].push_back(b);
       v[b].push_back(a);
    }
    int cont=0;
    vector<int> pila;
    pila.push_back(0);
    int corrente;
    while(pila.size()!=0){
       corrente=pila[0];
       pila.erase(pila.begin());
       if (visitato[corrente] == 0){
            visitato[corrente] = 1;
            cont+=array[corrente];
            for (vector <int>::iterator i = v[corrente].begin(); i!=v[corrente].end(); i++)
                    pila.push_back(*i);
        }
    }
    ou<<cont;
    return 0;
}