10 9 5
0 0 0 0 0 0 0 0 0 4
10 3
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10 2
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2 2 1 4 0 3 0 4 1 3
6 1
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1 1 0 1 1 1 1 1 1 1
3 10
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3 4 2 0 3 0 1 1 2 4
8 9
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1 10
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9 1
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7 9 1 5 4 6 0 3 8 2
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9 2
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1 9
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7 3
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0 1 2 0 1 2
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0 1 0 0 1 0 1 1 1 1
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2 3 5 7 0 8 6 9 4 1
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1 1 1 1 1 2 1 1 1 1
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0 0 0 0 1 1 0 1 1 1
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0 4 1 0 1 2 1 0 4 4
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0 2 1 2 2 0 1 0 1
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1
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 1
4 

/* Author: Ronak Agarwal, reader part not written by me*/
import java.io.* ; import java.util.* ;
import static java.lang.Math.min ; import static java.lang.Math.max ;
import static java.lang.Math.abs ; import static java.lang.Math.log ;
import static java.lang.Math.pow ; import static java.lang.Math.sqrt ;
/* Thread is created here to increase the stack size of the java code so that recursive dfs can be performed */
public class Contest{
	public static void main(String[] args) throws IOException{
		new Thread(null,new Runnable(){	public void run(){ exec_Code() ;} },"Solver",1l<<27).start() ;
	}
	static void exec_Code(){
		try{
			Solver Machine = new Solver() ;
			Machine.Solve() ; Machine.Finish() ;}
		catch(Exception e){ e.printStackTrace() ; print_and_exit() ;}
		catch(Error e){ e.printStackTrace() ; print_and_exit() ; }
	}
	static void print_and_exit(){ System.out.flush() ; System.exit(-1) ;}
}
/* Implementation of the Reader class */
class Reader { 
	private InputStream mIs;
	private byte[] buf = new byte[1024];
	private int curChar,numChars;
	public Reader() { this(System.in); } 
	public Reader(InputStream is) { mIs = is;} 
	public int read() {
		if (numChars == -1) throw new InputMismatchException();    
		if (curChar >= numChars) {
			curChar = 0;
			try { numChars = mIs.read(buf);} catch (IOException e) { throw new InputMismatchException();}
			if (numChars <= 0) return -1;            
		}
		return buf[curChar++];
	} 
	public String nextLine(){
		int c = read();
		while (isSpaceChar(c)) c = read();        
		StringBuilder res = new StringBuilder();
		do {
			res.appendCodePoint(c);
			c = read();
		} while (!isEndOfLine(c));
		return res.toString() ;
	} 
	public String s(){
		int c = read();
		while (isSpaceChar(c)) c = read();        
		StringBuilder res = new StringBuilder();
		do {
			res.appendCodePoint(c);
			c = read();
		}while (!isSpaceChar(c));
		return res.toString();
	} 
	public long l(){
		int c = read();
		while (isSpaceChar(c)) c = read();        
		int sgn = 1;
		if (c == '-') { sgn = -1 ; c = read() ; }
		long res = 0;
		do{
			if (c < '0' || c > '9') throw new InputMismatchException();
			res *= 10 ; res += c - '0' ; c = read();
		}while(!isSpaceChar(c));
		return res * sgn;
	} 
	public int i(){
		int c = read() ;
		while (isSpaceChar(c)) c = read();        
		int sgn = 1;
		if (c == '-') { sgn = -1 ; c = read() ; }
		int res = 0;
		do{
			if (c < '0' || c > '9') throw new InputMismatchException();
			res *= 10 ; res += c - '0' ; c = read() ;
		}while(!isSpaceChar(c));
		return res * sgn;
	} 
	public boolean isSpaceChar(int c) { return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1; } 
	public boolean isEndOfLine(int c) { return c == '\n' || c == '\r' || c == -1; } 
}   
/* All the useful functions,constants,renamings are here*/
class Template{
	/* Constants Section */
	final int INT_MIN = Integer.MIN_VALUE ; final int INT_MAX = Integer.MAX_VALUE ;
	final long LONG_MIN = Long.MIN_VALUE ; final long LONG_MAX = Long.MAX_VALUE ;
	static long MOD = 1000000007 ;
	static Reader ip = new Reader() ;	
	static PrintWriter op = new PrintWriter(System.out) ;
	/* Methods for writing */
	static void p(Object o){ op.print(o) ; }
	static void pln(Object o){ op.println(o) ;}
	static void Finish(){ op.flush(); op.close(); }
	/* Implementation of operations modulo MOD */
	static long inv(long a){ return powM(a,MOD-2) ; }
	static long m(long a,long b){ return (a*b)%MOD ; }
	static long d(long a,long b){ return (a*inv(b))%MOD ; }
	static long powM(long a,long b){
		if(b<0) return powM(inv(a),-b) ;
		long ans=1 ;
		for( ; b!=0 ; a=(a*a)%MOD , b/=2) if((b&1)==1) ans = (ans*a)%MOD ;
		return ans ;
	}
	/* Renaming of some generic utility classes */
	final static class mylist extends ArrayList<Integer>{}
	final static class myset extends TreeSet<Integer>{}
	final static class mystack extends Stack<Integer>{}
	final static class mymap extends TreeMap<Integer,Integer>{}
}
/* Implementation of the pair class, useful for every other problem */
class pair implements Comparable<pair>{
	int x ; int y ;
	pair(int _x,int _y){ x=_x ; y=_y ;} 
	public int compareTo(pair p){
		return (this.x<p.x ? -1 : (this.x>p.x ? 1 : (this.y<p.y ? -1 : (this.y>p.y ? 1 : 0)))) ;
	}
}
/* Main code starts here */
class Solver extends Template{
	final int MAXN = 100005 ;
	mylist out[] = new mylist[MAXN] ;
	mylist in[] = new mylist[MAXN] ;
	int u[] = new int[MAXN] ;
	int topo[] = new int[MAXN] ;
	boolean vis[] = new boolean[MAXN] ;
	int idx ;
	int mrk=0 ;
	int comp[] = new int[MAXN] ;
	int cnt[] = new int[MAXN] ;
	int odeg[] = new int[MAXN] ;
	void dfs(int nd){
		vis[nd]=true ;
		for(int ng : out[nd]) if(!vis[ng]) dfs(ng) ;
		topo[idx--] = nd ;
	}
	void dfs2(int nd){
		comp[nd]=mrk ; cnt[mrk]++ ;
		for(int ng : in[nd]) if(comp[ng]==0) dfs2(ng) ;
	}
	public void Solve() throws IOException{
		int n = ip.i() ; int m = ip.i() ; int h = ip.i() ;
		for(int i=1 ; i<=n ; i++) u[i] = ip.i() ;
		for(int i=1 ; i<=n ; i++) out[i] = new mylist() ;
		for(int i=1 ; i<=n ; i++) in[i] = new mylist() ;
		for(int i=1 ; i<=m ; i++){
			int x = ip.i() ; int y = ip.i() ;
			int ux = u[x] ; int uy = u[y] ;
			if(((uy-ux)+h)%h==1){
				out[x].add(y) ;
				in[y].add(x) ;
			}
			if(((ux-uy)+h)%h==1){ 
				out[y].add(x) ;
				in[x].add(y) ;
			}
		}
		idx=n-1 ;
		for(int i=1 ; i<=n ; i++) if(!vis[i]) dfs(i) ;
		for(int i=0 ; i<n ; i++){
			int v = topo[i] ;
			if(comp[v]==0){
				++mrk ;
				dfs2(v) ;
			}
		}
		// for(int i=0 ; i<n ; i++) p(topo[i]+" ") ;
		// pln("") ;
		// for(int i=1 ; i<=n ; i++) p(comp[i]+" ") ;
		// pln("") ;
		for(int i=1 ; i<=n ; i++){
			int j = comp[i] ;
			for(int chd : out[i])
				if(comp[chd]!=j)
					odeg[j]++ ;
		}
		int res = -1 ; int mn = INT_MAX ;
		for(int i=1 ; i<=mrk ; i++) if(odeg[i]==0 && cnt[i]<mn){
			res = i ; mn = cnt[i] ;
		}
		pln(mn) ;
		for(int i=1 ; i<=n ; i++) if(comp[i]==res) p(i+" ") ;
		pln("") ;
	}
} 