#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <cmath>
#include <iomanip>
#include <stack>
#include <queue>
#include <numeric>
#include <map>
#include <unordered_map>
#include <set>
#include <fstream>
#include <chrono>
#include <random>
#include <bitset>
//#include <atcoder/all>
#define rep(i,n) for(int i=0;i<(n);i++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) ((int)(x).size())
#define pb push_back
using ll = long long;
using namespace std;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
ll gcd(ll a, ll b) {return b?gcd(b,a%b):a;}
ll lcm(ll a, ll b) {return a/gcd(a,b)*b;}


int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  const int X = 150;
  int N,M; cin >> N >> M;
  vector<int> W(N);
  vector<vector<int>> F(N);
  vector<multiset<int>> FW(N);
  vector<map<int,int>> memo(N);
  rep(i,N) cin >> W[i];
  rep(i,N) W[i]--;
  rep(i,M){
    int a,b; cin >> a >> b; a--; b--;
    if(a==b) continue;
    F[a].pb(b);
    F[b].pb(a);
  }
  rep(i,N){
    rep(j,sz(F[i])){
      int f = F[i][j];
      FW[i].insert(W[f]);
      if(sz(F[f])>X) memo[i][f] = W[f];
    }
  }
  return 0;
  int Q; cin >> Q;
  while(Q--){
    int x,y; cin >> x >> y; x--; y--;
    if(W[x]==W[y]) cout << "No\n";
    else{
      int wx = W[x];
      int wy = W[y];
      vector<pair<int,int>> err;
      for(auto m:memo[x]){
        if(W[m.first]!=m.second){
          err.pb({m.first,W[m.first]});
        }
      }
      rep(i,sz(err)){
        int f = err[i].first;
        int pre = memo[x][f];
        int now = err[i].second;
        memo[x][f] = now;
        FW[x].erase(FW[x].find(pre));
        FW[x].insert(now);
      }
      if(FW[x].find(wy)!=FW[x].end()){
        cout << "Yes\n";
        W[x] = wy;
        if(sz(F[x])<=X){
          rep(i,sz(F[x])){
            int f = F[x][i];
            FW[f].erase(FW[f].find(wx));
            FW[f].insert(wy);
          }
        }
      }
      else cout << "No\n";
    }
  }
  return 0;
}