#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    ll n, m;
    cin >> n >> m;
    vector<ll> cnt(n);
    vector<int> c(n);
    rep(i,n) cin >> c[i];
    rep(i,n) c[i]--;
    vector<int> l(n);
    dsu uf(n);
    rep(i,m){
        int a, b;
        cin >> a >> b;
        --a;--b;
        if(c[a]==c[b]) {
            if(!uf.same(a, b)){
                uf.merge(a,b);
                l[c[a]]++;
            }
        }
    }
    rep(i,n){
        cnt[c[i]]++;
    }
    ll ans = 0;
    rep(i,n){
        ans += max(0ll, cnt[i] - l[i]-1);
    }
    cout <<ans << endl;
    return 0;
}