#include <stdio.h>

typedef struct tree {
  long long v;
  struct tree *p;
} tree;

tree *get_root (tree *t) {
  if (t == NULL || t->p == NULL) {
    return t;
  }
  
  t->p = get_root(t->p);
  return t->p;
}

int main () {
  int n = 0;
  int m = 0;
  long long a = 0LL;
  int u = 0;
  int v = 0;
  
  int res = 0;
  
  long long ans = 1LL;
  long long mod_num = 998244353LL;
  
  tree t[200000] = {};
  
  res = scanf("%d", &n);
  res = scanf("%d", &m);
  for (int i = 0; i < n; i++) {
    res = scanf("%lld", &a);
    t[i].v = a;
    t[i].p = NULL;
  }
  for (int i = 0; i < m; i++) {
    tree *rt1 = NULL;
    tree *rt2 = NULL;
    res = scanf("%d", &u);
    res = scanf("%d", &v);
    u--;
    v--;
    rt1 = get_root(t+u);
    rt2 = get_root(t+v);
    if (rt1 != rt2) {
      rt1->v += rt2->v;
      rt1->v %= mod_num;
      rt2->p = rt1;
    }
  }
  
  for (int i = 0; i < n; i++) {
    tree *rt = get_root(t+i);
    ans *= rt->v;
    ans %= mod_num;
  }
  
  printf("%lld\n", ans);
  return 0;
}