Language: Java

	public main(String[] args) {
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();
		boolean card[][]= new boolean[4][13];
		for(int s=0;s<4;s++){
			for(int i=0;i<13;i++)card[s][i]=false;
		}
		for(int i=0;i<n;i++){
			String a=in.next();
			int b = in.nextInt();
			if(a.equals("S")){
				card[0][b-1]=true;
			}else if(a.equals("H")){
				card[1][b-1]=true;
			}else if(a.equals("C")){
				card[2][b-1]=true;
			}else if(a.equals("D")){
				card[3][b-1]=true;
			}
		}
		for(int s=0;s<4;s++){
			for(int i=0;i<13;i++){
				if(card[s][i]==false){
					if(s==0)System.out.print("S ");
					else if(s==1)System.out.print("H ");
					else if(s==2)System.out.print("C ");
					else if(s==3)System.out.print("D ");
					System.out.println(i+1);
				}
			}
		}
	}

Compiler output:
Main.java:1: error: class, interface, enum, or record expected
	public main(String[] args) {
	       ^
Main.java:3: error: unnamed classes are a preview feature and are disabled by default.
		int n = in.nextInt();
		^
  (use --enable-preview to enable unnamed classes)
Main.java:4: error: class, interface, enum, or record expected
		boolean card[][]= new boolean[4][13];
		^
Main.java:5: error: class, interface, enum, or record expected
		for(int s=0;s<4;s++){
		^
Main.java:5: error: class, interface, enum, or record expected
		for(int s=0;s<4;s++){
		            ^
Main.java:5: error: class, interface, enum, or record expected
		for(int s=0;s<4;s++){
		                ^
Main.java:6: error: class, interface, enum, or record expected
			for(int i=0;i<13;i++)card[s][i]=false;
			            ^
Main.java:6: error: class, interface, enum, or record expected
			for(int i=0;i<13;i++)card[s][i]=false;
			                 ^
Main.java:7: error: class, interface, enum, or record expected
		}
		^
Main.java:8: error: class, interface, enum, or record expected
		for(int i=0;i<n;i++){
		            ^
Main.java:8: error: class, interface, enum, or record expected
		for(int i=0;i<n;i++){
		                ^
Main.java:11: error: class, interface, enum, or record expected
			if(a.equals("S")){
			^
Main.java:13: error: class, interface, enum, or record expected
			}else if(a.equals("H")){
			^
Main.java:15: error: class, interface, enum, or record expected
			}else if(a.equals("C")){
			^
Main.java:17: error: class, interface, enum, or record expected
			}else if(a.equals("D")){
			^
Main.java:19: error: class, interface, enum, or record expected
			}
			^
Main.java:21: error: class, interface, enum, or record expected
		for(int s=0;s<4;s++){
		            ^
Main.java:21: error: class, interface, enum, or record expected
		for(int s=0;s<4;s++){
		                ^
Main.java:22: error: class, interface, enum, or record expected
			for(int i=0;i<13;i++){
			            ^
Main.java:22: error: class, interface, enum, or record expected
			for(int i=0;i<13;i++){
			                 ^
Main.java:25: error: class, interface, enum, or record expected
					else if(s==1)System.out.print("H ");
					^
Main.java:26: error: class, interface, enum, or record expected
					else if(s==2)System.out.print("C ");
					^
Main.java:27: error: class, interface, enum, or record expected
					else if(s==3)System.out.print("D ");
					^
Main.java:28: error: class, interface, enum, or record expected
					System.out.println(i+1);
					^
Main.java:29: error: class, interface, enum, or record expected
				}
				^
25 errors