10 9 5
0 0 0 0 0 0 0 0 0 4
10 3
10 7
10 5
10 8
10 9
10 1
10 4
10 6
10 2
 10 20 5
2 2 1 4 0 3 0 4 1 3
6 1
8 5
2 10
3 5
1 9
4 6
9 7
2 3
7 4
10 8
4 9
2 5
4 10
2 8
10 3
1 8
8 10
6 7
5 1
10 3
 10 9 2
1 1 0 1 1 1 1 1 1 1
3 10
3 8
3 6
3 7
3 5
3 4
3 1
3 9
3 2
 10 10 5
3 4 2 0 3 0 1 1 2 4
8 9
7 3
5 2
4 8
3 5
6 8
3 5
1 10
10 6
9 1
 10 30 10
7 9 1 5 4 6 0 3 8 2
10 8
8 5
6 1
8 5
3 10
10 8
9 2
8 5
7 3
3 10
1 9
10 8
6 1
1 9
8 5
7 3
1 9
7 3
7 3
4 6
10 8
7 3
3 10
10 8
1 9
8 5
6 1
4 6
3 10
6 1
 6 7 3
0 1 2 0 1 2
1 2
2 3
3 1
3 4
4 5
5 6
6 4
 10 9 2
0 1 0 0 1 0 1 1 1 1
3 7
3 2
8 6
1 7
3 9
5 4
10 1
4 9
6 2
 10 10 10
2 3 5 7 0 8 6 9 4 1
1 2
10 1
5 10
5 10
4 6
8 5
1 2
1 2
7 4
1 2
 10 9 5
1 1 1 1 1 2 1 1 1 1
6 7
6 3
6 5
6 4
6 9
6 8
6 1
6 10
6 2
 10 9 2
0 0 0 0 1 1 0 1 1 1
4 10
8 2
10 3
3 9
1 5
6 2
6 1
7 9
8 7
 5 5 3
2 2 0 1 0
5 4
5 2
1 4
5 1
4 3
 10 9 5
0 4 1 0 1 2 1 0 4 4
8 7
4 3
1 5
2 4
6 5
10 8
9 1
6 7
6 3
 7 8 3
0 0 1 2 2 0 1
1 5
4 3
7 5
1 7
3 2
2 4
6 7
6 5
 10 30 7
5 4 2 3 3 2 5 0 1 6
7 2
2 4
9 3
3 5
5 2
7 10
6 5
10 1
9 8
10 8
3 4
10 4
4 2
7 6
2 8
1 10
5 10
5 6
5 6
6 2
6 5
9 10
8 6
2 4
9 7
1 9
10 4
6 10
9 3
2 7
 5 5 3
1 1 2 0 0
1 3
1 5
2 3
3 4
2 4
 10 10 2
1 1 1 0 1 0 0 0 0 1
4 10
10 7
7 1
5 6
6 3
1 8
2 9
5 4
3 8
2 9
 9 13 3
0 2 1 2 2 0 1 0 1
4 7
9 5
7 5
7 6
9 6
8 2
3 2
8 3
4 3
4 9
1 2
1 3
5 6
 6 3 3
0 1 2 0 1 2
4 5
5 6
4 6
 10 10 5
3 3 3 4 4 1 3 0 2 4
7 5
10 8
10 8
5 8
2 10
9 2
7 4
3 4
7 5
4 8
 10 15 2
1 0 1 1 0 0 1 0 0 1
5 1
7 8
2 10
3 5
1 9
6 4
7 9
2 3
6 4
8 10
9 4
8 4
8 1
10 8
6 7
 2 1 2
1 0
1 2
 5 5 4
0 1 2 3 3
1 2
2 3
3 4
4 1
3 5
 10 9 5
2 1 2 0 1 0 1 2 0 4
10 9
3 7
1 5
10 6
7 9
10 4
5 4
2 6
8 2
 9 10 3
0 2 2 1 0 0 1 2 1
4 6
2 6
5 7
4 8
9 2
9 1
3 5
8 1
3 7
6 2
 10 20 3
2 2 1 1 2 0 0 1 2 2
7 5
7 10
2 7
10 4
10 8
1 7
3 7
9 7
3 10
6 3
4 1
4 1
8 6
3 7
10 3
2 7
8 5
2 7
1 4
2 6
 10 9 8
3 2 1 1 5 6 7 0 4 0
10 7
5 9
10 4
7 6
6 5
3 2
2 1
9 1
3 8

1
1 
 5
1 4 6 7 9 
 10
1 2 3 4 5 6 7 8 9 10 
 1
2 
 1
2 
 3
4 5 6 
 10
1 2 3 4 5 6 7 8 9 10 
 1
2 
 1
6 
 10
1 2 3 4 5 6 7 8 9 10 
 3
1 4 5 
 1
6 
 3
2 3 4 
 8
2 3 4 5 7 8 9 10 
 3
2 3 4 
 2
2 9 
 1
4 
 1
1 
 1
1 
 10
1 2 3 4 5 6 7 8 9 10 
 2
1 2 
 1
5 
 1
1 
 3
3 5 7 
 3
3 7 10 
 1
4 

#include <bits/stdc++.h>
using namespace std;
inline int gotcha() {
  int a = 0, b = 1, c = getchar();
  while (!isdigit(c)) b ^= c == '-', c = getchar();
  while (isdigit(c)) a = a * 10 + c - 48, c = getchar();
  return b ? a : -a;
}
const int _ = 100002, __ = _ << 1;
struct edge {
  int to[__], ne[__], he[_], ecnt;
  edge() { memset(he, 0, sizeof(he)), ecnt = 1; }
  void adde(int a, int b) { to[++ecnt] = b, ne[ecnt] = he[a], he[a] = ecnt; }
} e;
int dfn[_] = {0}, low[_] = {0}, cnt = 0, sta[_], lst = 0;
int co[_], cocnt = 0, du[_] = {0};
bool ed[_] = {0};
vector<int> col[_];
void tarjan(int now) {
  dfn[now] = low[now] = ++cnt;
  sta[++lst] = now, ed[now] = 1;
  int i, b;
  for (i = e.he[now]; i; i = e.ne[i]) {
    b = e.to[i];
    if (!dfn[b])
      tarjan(b), low[now] = min(low[now], low[b]);
    else if (ed[b])
      low[now] = min(low[now], dfn[b]);
  }
  if (low[now] == dfn[now]) {
    cocnt++, ed[now] = 0;
    while (sta[lst + 1] != now) {
      co[sta[lst]] = cocnt;
      col[cocnt].push_back(sta[lst]);
      ed[sta[lst--]] = 0;
    }
  }
}
int n, m, hr, un[_];
int main() {
  int i, j, k, a, b, mi, miloc;
  n = gotcha(), m = gotcha(), hr = gotcha();
  mi = n + 1, miloc = 0;
  for (i = 1; i <= n; i++) un[i] = gotcha();
  for (i = 1; i <= m; i++) {
    a = gotcha(), b = gotcha();
    if (un[a] == (un[b] + 1) % hr) e.adde(a, b);
    if (un[b] == (un[a] + 1) % hr) e.adde(b, a);
  }
  for (i = 1; i <= n; i++)
    if (!dfn[i]) tarjan(i);
  for (i = 1; i <= n; i++)
    for (j = e.he[i]; j; j = e.ne[j]) {
      k = e.to[j];
      if (co[i] != co[k]) du[co[k]]++;
    }
  for (i = 1; i <= cocnt; i++) {
    if (!du[i]) {
      a = col[i].size();
      if (a < mi) mi = a, miloc = i;
    }
  }
  sort(col[miloc].begin(), col[miloc].end());
  printf("%d\n", mi);
  for (i = 0; i < mi; i++) printf("%d ", col[miloc][i]);
  return 0;
}
