#include <cassert>// c
#include <iostream>// io
#include <iomanip>
#include <fstream>
#include <sstream>
#include <vector>// container
#include <map>
#include <set>
#include <queue>
#include <bitset>
#include <stack>
#include <algorithm>// other
#include <complex>
#include <numeric>
#include <functional>
#include <random>
#include <regex>
using namespace std;

typedef long long ll;typedef unsigned long long ull;typedef long double ld;

#define ALL(c) c.begin(),c.end()
#define IN(l,v,r) (l<=v && v < r)
template<class T> void UNIQUE(T& v){v.erase(unique(ALL(v)),v.end());}
//debug==
#define DUMP(x) cerr << #x <<" = " << (x)
#define LINE() cerr<< " (L" << __LINE__ << ")"

struct range{
	struct Iter{
		int v,step;
		Iter& operator++(){v+=step;return *this;}
		bool operator!=(Iter& itr){return v<itr.v;}
		int& operator*(){return v;}
	};
	Iter i, n;
	range(int i, int n,int step):i({i,step}), n({n,step}){}
	range(int i, int n):range(i,n,1){}
	range(int n):range(0,n){}
	Iter& begin(){return i;}
	Iter& end(){return n;}
};
struct rrange{
	struct Iter{
		int v,step;
		Iter& operator++(){v-=step;return *this;}
		bool operator!=(Iter& itr){return v>itr.v;}
		int& operator*(){return v;}
	};
	Iter i, n;
	rrange(int i, int n,int step):i({i-1,step}), n({n-1,step}){}
	rrange(int i, int n):rrange(i,n,1){}
	rrange(int n) :rrange(0,n){}
	Iter& begin(){return n;}
	Iter& end(){return i;}
};

//input
template<typename T1,typename T2> istream& operator >> (istream& is,pair<T1,T2>& p){return is>>p.first>>p.second;}
template<typename T1> istream& operator >> (istream& is,tuple<T1>& t){return is >> get<0>(t);}
template<typename T1,typename T2> istream& operator >> (istream& is,tuple<T1,T2>& t){return is >> get<0>(t) >> get<1>(t);}
template<typename T1,typename T2,typename T3> istream& operator >> (istream& is,tuple<T1,T2,T3>& t){return is >>get<0>(t)>>get<1>(t)>>get<2>(t);}
template<typename T1,typename T2,typename T3,typename T4> istream& operator >> (istream& is,tuple<T1,T2,T3,T4>& t){return is >> get<0>(t)>>get<1>(t)>>get<2>(t)>>get<3>(t);}
template<typename T> istream& operator >> (istream& is,vector<T>& as){for(int i:range(as.size()))is >>as[i];return is;}
//output
template<typename T> ostream& operator << (ostream& os, const set<T>& ss){for(auto a:ss){if(a!=ss.begin())os<<" "; os<<a;}return os;}
template<typename T1,typename T2> ostream& operator << (ostream& os, const pair<T1,T2>& p){return os<<p.first<<" "<<p.second;}
template<typename K,typename V> ostream& operator << (ostream& os, const map<K,V>& m){bool isF=true;for(auto& p:m){if(!isF)os<<endl;os<<p;isF=false;}return os;}
template<typename T1> ostream& operator << (ostream& os, const tuple<T1>& t){return os << get<0>(t);}
template<typename T1,typename T2> ostream& operator << (ostream& os, const tuple<T1,T2>& t){return os << get<0>(t)<<" "<<get<1>(t);}
template<typename T1,typename T2,typename T3> ostream& operator << (ostream& os, const tuple<T1,T2,T3>& t){return os << get<0>(t)<<" "<<get<1>(t)<<" "<<get<2>(t);}
template<typename T1,typename T2,typename T3,typename T4> ostream& operator << (ostream& os, const tuple<T1,T2,T3,T4>& t){return os << get<0>(t)<<" "<<get<1>(t)<<" "<<get<2>(t)<<" "<<get<3>(t);}
template<typename T> ostream& operator << (ostream& os, const vector<T>& as){for(int i:range(as.size())){if(i!=0)os<<" "; os<<as[i];}return os;}
template<typename T> ostream& operator << (ostream& os, const vector<vector<T>>& as){for(int i:range(as.size())){if(i!=0)os<<endl; os<<as[i];}return os;}

// values
template<typename T> inline T INF(){assert(false);};
template<> inline int INF<int>(){return 1<<28;};
template<> inline ll INF<ll>(){return 1LL<<60;};
template<> inline double INF<double>(){return 1e16;};
template<> inline long double INF<long double>(){return 1e16;};

template<class T> inline T EPS(){assert(false);};
template<> inline int EPS<int>(){return 1;};
template<> inline ll EPS<ll>(){return 1LL;};
template<> inline double EPS<double>(){return 1e-12;};
template<> inline long double EPS<long double>(){return 1e-12;};

// min{2^r | n < 2^r}
template<typename T> inline T upper_pow2(T n){ T res=1;while(res<n)res<<=1;return res;}
// max{d | 2^d  <= n}
template<typename T> inline T msb(T n){ int d=62;while((1LL<<d)>n)d--;return d;}

template<typename T,typename U> T pmod(T v,U M){return (v%M+M)%M;}


template<typename T> class Monoid{
public:
	virtual T e()=0,c(T,T)=0;
};

template<typename T> class MaxMonoid:public Monoid<T>{
public:
	T e(){return -INF<T>();}
	T c(T a,T b){return max(a,b);}
	static MaxMonoid<T>& i(){static MaxMonoid<T> i;return i;}
};

template<class T> class SparseTable{
public:
	vector<vector<T>> dbl;Monoid<T>& m;
	SparseTable(const vector<T>& as,Monoid<T>& m):dbl(msb(as.size())+1,vector<T>(as.size())),m(m){
		copy(ALL(as),dbl[0].begin());
		for(int l:range(1,dbl.size()))
			for(int i:range(dbl[l].size()))
				dbl[l][i]=m.c(dbl[l-1][i],dbl[l-1][i+(1<<(l-1))]);
	}
	inline T get(int v){return dbl[0][v];}
	T query(int a,int b){ //[a,b)
		if(a > b) assert(false);
		if(a == b) return m.e();
		int l=msb(b-a);
		return m.c(dbl[l][a],dbl[l][b-(1<<l)]);
	}
};

template <typename T,typename Func> T satisfy_mini(Func P,T l ,T r){//(l |sep| r)
	l -= EPS<T>();
	while(r-l>EPS<T>()){
		T m=(l+r)/2;
		(P(m)?r:l)=m;
	}
	return r;
}


struct UnionFind{
    vector<int> par,rank,ss;
    int size;
    UnionFind(int n):size(n){
        par=vector<int>(n);iota(ALL(par),0);
        rank = vector<int>(n);ss=vector<int>(n,1);
    }
    int root(int x){
      return par[x] = par[x] == x ? x: root(par[x]);
    }
    bool same(int x,int y){
      return root(x) == root(y);
    }
    void unite(int x,int y){
        x = root(x);y = root(y);
        if(x==y)return;
        if(rank[x]>rank[y])swap(x,y);
        par[x] = y;ss[y]+=ss[x];
        if(rank[x] == rank[y]) rank[x]++;
        size--;
    }
    int getS(int x){
      return ss[root(x)];
    }
};


class Main{
	public:

	void run(){
		int N,M;cin >> N >> M;
		vector<int> ps(N);cin >> ps;
		for(int i:range(N)) ps[i]--;

		vector<pair<int,int>> pas(M);cin >> pas;
		for(int i:range(M)){
			pas[i].first--;pas[i].second--;
		} 

		UnionFind uf(N);
		for(int i:range(M)){
			uf.unite(pas[i].first,pas[i].second);
		}
		map<int,vector<int>> gs;
		for(int i:range(N)) gs[uf.root(i)].push_back(i);

		ll res = 0;
		for(auto p:gs){
			set<int> aset;
			for(int i:p.second){
				aset.insert(i);
			}
			for(int i:p.second){
				res += aset.count(ps[i]);
			}
		} 
		cout<< res << endl;

	}
};

int main(){
	cout <<fixed<<setprecision(20);
	cin.tie(0);
	ios::sync_with_stdio(false);
	Main().run();
	return 0;
}


Measured memory_bytes: 13568