description: A chess tournament will be held soon, where n chess players will take part. Every participant will play one game against every other participant. Each game ends in either a win for one player and a loss for another player, or a draw for both players.
  
  Each of the players has their own expectations about the tournament, they can be one of two types:
  
    1. a player wants not to lose any game (i. e. finish the tournament with zero losses); 
    2. a player wants to win at least one game. 
  
  
  
  You have to determine if there exists an outcome for all the matches such that all the players meet their expectations. If there are several possible outcomes, print any of them. If there are none, report that it's impossible.
  
  Input
  
  The first line contains a single integer t (1 ≤ t ≤ 200) — the number of test cases.
  
  The first line of each test case contains one integer n (2 ≤ n ≤ 50) — the number of chess players.
  
  The second line contains the string s (|s| = n; s_i ∈ \{1, 2\}). If s_i = 1, then the i-th player has expectations of the first type, otherwise of the second type.
  
  Output
  
  For each test case, print the answer in the following format:
  
  In the first line, print NO if it is impossible to meet the expectations of all players.
  
  Otherwise, print YES, and the matrix of size n × n in the next n lines.
  
  The matrix element in the i-th row and j-th column should be equal to:
  
    * +, if the i-th player won in a game against the j-th player; 
    * -, if the i-th player lost in a game against the j-th player; 
    * =, if the i-th and j-th players' game resulted in a draw; 
    * X, if i = j. 
  
  Example
  
  Input
  
  
  3
  3
  111
  2
  21
  4
  2122
  
  
  Output
  
  
  YES
  X==
  =X=
  ==X
  NO
  YES
  X--+
  +X++
  +-X-
  --+X
solution: import java.util.*;
  import java.io.*;
  public class Test {
  	public static void main(String[] args) throws IOException {
  	   Scanner sc = new Scanner(System.in);
  	   PrintWriter pw = new PrintWriter(System.out);
  	   int t = sc.nextInt();
  	   while(t-->0) {
  		   int n = sc.nextInt();
  		   char [] players = sc.next().toCharArray();
  		   int typeOne = 0;
  		   int typeTwo = 0;
  	       HashSet<Integer> arr1 = new HashSet<Integer>();
  	       HashSet<Integer> hs2 = new HashSet<Integer>();
             for (int i = 0;i<n;i++) {
          	   if (players[i]=='1') {
          		   typeOne++;
          		   arr1.add(i);
          	   }
          	   else {
          		   typeTwo++;
          		   hs2.add(i);
          	   }
             }
             if (typeTwo<=2&& typeTwo>0) {
          	   System.out.println("NO");
             }
             else {
          	   boolean []done = new boolean [n];
          	   System.out.println("YES");
          	   char [][] ans = new char [n][n];
          	   for(int i = 0;i<n;i++) {
          		   for(int j = 0;j<n;j++) {
          			   if(i == j) {
          				   ans[i][j] = 'X';
          			   }
          			   else if (arr1.contains(i)) {
          				   ans[i][j] = '=';
          			   }
          			   else if (arr1.contains(j)) {
          				   ans[i][j] = '=';
          			   }
          			   else if (ans[j][i]=='+') {
          				   ans[i][j] = '-';
          			   }
          			   else if (ans[j][i]=='-') {
          				   ans[i][j] = '+';
          			   }
          			   else if (ans[j][i]=='=') {
          				   ans[i][j] = '=';
          			   }
          			   else if ((!done[i])) {
          				   ans[i][j] = '+';
          				   ans[j][i] = '-';
          				   done[i] = true;
          			   }
          			   else {
          				   ans[i][j]= '-';
          			   }
          		   }
          	   }
          	   for(int i = 0;i<n;i++) {
          		   for(int j = 0;j<n;j++) {
          			   System.out.print(ans[i][j]);
          		   }
          		   System.out.println();
          	   }
          	   
          	   
             }
  	   }
  	
  	     
  	  }
  	static int numOfSubArrays (int [] nums) {
  		 int n = nums.length;
  		 int ans = 0;
  		for(int i = 0;i<n;i++) {
  			//HashSet<Integer> hs = new HashSet<Integer>();
  			HashMap<Integer, Integer> hm = new HashMap<Integer, Integer>();
  			hm.put(nums[i], 1);
  			int count = 1;
  			for(int j = i+1;j<n;j++) {
  				if (!hm.containsKey(nums[j])) {
  					count ++;
  					hm.put(nums[j],1);
  				}
  				else if (hm.get(nums[j])==1) {
  					count --;
  					hm.remove(nums[j]);
  					hm.put(nums[j],2);
  				}
  				if (count == 0) {
  					ans++;
  				}
  			}
  		}
  		return ans;
  	}
  	static void bfs(int s) {
  		
  	    parent[s]=-1;
  	    Queue<Integer> q = new LinkedList<Integer>();
  		q.add(s);
  		visited[s] = true;
  		while(!q.isEmpty()) {
  			int u = q.poll();
  			
  			//System.out.println("u"+" "+u);
  			for(int v : adjList[u]) {
  				//System.out.println("v"+" "+v);
  
  				if(!visited[v]) {
  					q.add(v);
  					parent[v] = u;
  					distance[v] = 1+distance[u];
  					visited[v]=true;
  					if(v==n-1) {
  						return;
  					}
  				}
  				
  			}}
  		
  		
  		
  		
  
  		
  	}static ArrayList<Integer> ans;
  	static int d1;
  		   static class triple {
  	            int u;
  	            int v;
  	            int z;
  	 
  	            public triple(int u, int v, int z) {
  	                this.u = u;
  	                this.v = v;
  	                this.z = z;
  	            }
  	 
  	            public String toString() {
  	                return "triple{" +
  	                        "u=" + u +
  	                        ", v=" + v +
  	                        ", z=" + z +
  	                        '}';
  	            }
  	 
  	            public boolean equals(Object o) {
  	                if (this == o) return true;
  	                if (o == null || getClass() != o.getClass()) return false;
  	                triple triple = (triple) o;
  	                return u == triple.u &&
  	                        v == triple.v &&
  	                        z == triple.z;
  	            }
  	 
  	            public int hashCode() {
  	                return Objects.hash(u, v, z);
  	            }}
  	 
  
  	static int [] distance; 
  	static  ArrayList<Integer> [] adjList ;
  	
  	static HashMap<Pair,Integer> hm;
  	static boolean [] visited;
  	static int [] parent;
  	public static boolean check (int a) {
  		if(a==2) {
  			return true;
  		}
  		ArrayList <Integer> indices = new ArrayList<Integer>();
  		for (int i = 0;i<arr.length;i++) {
  			if (arr[i] <= a) {
  				indices.add(i);
  			}}
  		boolean first = false;
  		ArrayList<Integer> jumps = new ArrayList<Integer>();
  		for(int i = 0;i<indices.size()-1;i++) {
  			//System.out.println(indices.get(i+1));
  			if (indices.get(i+1)-indices.get(i)>1) {
  				jumps.add(indices.get(i+1)-indices.get(i));
  				
  				
  			}
  		}
  		
  		if (jumps.size()==0||(jumps.size()==2&&jumps.get(0)==2)||(jumps.size()==2&&jumps.get(1)==2)||(jumps.size()==1&&jumps.get(0)==2)||(jumps.size()==1&&a==3)){
  			return true;
  		}
  		else {
  			return false;
  		}
  		
  			
  	}
  	static class Edge {
  		int u ;
  		int v ;
  		boolean visited = false;
  		ArrayList<Edge> adjList;
  		public Edge  (int u , int v) {
  			this.u = u;
  			this.v = v;
  			this.adjList = new ArrayList<Edge>();
  		}
  		public void add(Edge e) {
  			this.adjList.add(e);
  		}
  	}
  	static int [] arr;
  	static long mod;
  	public static double solve(int currTrial, int lampsMask) {
  		if(lampsMask ==0 || currTrial==101) {
  			return (currTrial-1);
  		}
  		if(dp[currTrial][lampsMask]!=-1) {
  			return dp[currTrial][lampsMask];
  		}
  		double tot = 0;
  		for(int i = 0;i<m;i++) {
  			tot += (solve(currTrial+1,lampsMask^switchMask[i])/m);
  		}
  	    
  		return dp[currTrial][lampsMask] = (tot);
  		
  	}
  	static double [][] dp ;
  	static double probFactor;
  	static int m;
  	static int [] switchMask;
      static int lcs(char[] X, char[] Y, int m, int n)
       {
           if (m == 0 || n == 0)
               return 0;
           if (X[m - 1] == Y[n - 1])
               return 1 + lcs(X, Y, m - 1, n - 1);
           else
               return Math.max(lcs(X, Y, m, n - 1), lcs(X, Y, m - 1, n));
       }
  	    public static void dfs1(int node) {
  	    	visited1[node] = true;
  	    	for(int v :adjLists1[node]) {
  	    		if(!visited1[v]) {
  	    			dfs1(v);
  	    		}
  	    	}
  	    	
  	    }
  	   static int maxSubsequenceSubstring(char[] X,char[] Y,int n,int m)
  	    {
  	        // Base Case
  	        if (n==0 || m==0) return 0;
  	        
  	        // Calls on smaller inputs
  	        
  	        // if the last char of both strings are equal
  	        if(X[n-1] == Y[m-1])
  	        {
  	            return  1 + maxSubsequenceSubstring(X,Y,n-1,m-1);
  	        }
  	        
  	        // if the last char of both strings are not equal
  	        else
  	        {
  	            return maxSubsequenceSubstring(X,Y,n-1,m);    
  	        }
  	    }
  	    public static void dfs2(int node) {
  	    	visited2[node] = true;
  	    	for(int v :adjLists2[node]) {
  	    		if(!visited2[v]) {
  	    			dfs2(v);
  	    		}
  	    	}
  	    }
  	    static class Picture implements Comparable{
  	    	char [][] pixels;
  	    	int numOFOnes;
  	    	int idx;
  	    	public Picture(char [][] pixels, int numOfOnes, int idx) {
  	    		this.pixels = pixels;
  	    		this.numOFOnes = numOfOnes;
  	    		this.idx = idx;
  	    	}
  			@Override
  			public int compareTo(Object arg0) {
  				Picture p = (Picture) arg0;
  				return numOFOnes - p.numOFOnes;
  			}
  	    	
  	    }
  	    static  ArrayList<Integer> [] adjLists1;
  	    static ArrayList<Integer> [] adjLists2;
  	    static boolean []visited1;
  	    static boolean [] visited2;
  		//static int [] arr ;
  		static int d [] ;
  		
  	   static  HashSet<Long> hs = new HashSet<Long>();
  	  
  	public static int idxOf(String s,char c) {
  		int idx = -2;
  		for(int i = 0;i<s.length();i++) {
  			if(s.charAt(i)==c) {
  				return i;
  			}
  		}
  		return idx;
  	}
  	static ArrayList<Long >start;
  	static ArrayList<Long> end;
  	public static void dfs (int idx) {
  		can[idx] = true;
  		for(int i = 0;i<start.size();i++) {
  			if((start.get(i)<start.get(idx)&& end.get(i)>start.get(idx)||(start.get(i)<end.get(idx)&& end.get(i)>end.get(idx)))){
  				if(!can[i]) {
  				dfs(i);
  			}}
  		}
  	}
  	static boolean [] can ; 
  	static int n;
  	
  	static int [] [] sol;
  	static int [] g;
  	public static void constructSol() {
  		for(int i = 1;i<sol.length;i++) {
  			for(int j = 1;j<10;j++) {
  				if(g[i] == j) {
  					sol[i][j] = sol[i-1][j]+1;
  				}
  				else {
  					sol[i][j] = sol[i-1][j];
  				}
  			}
  		}
  	}
  	public static void prod() {
  		for(int i=1;i<g.length;i++) {
  			int n = i;
  		if(n<10) {
  			g[ n] = n;
  		    continue;
  		}
  		int prod = 1;
  		while(n>0) {
  			if(n%10!=0) {
  				prod*= (n%10);
  				
  			}
  			n/=10;
  		}
  		//System.out.println(prod);
  		g[i] = g[prod];
  	
  	}}
  	public static  boolean isPalindrome(String s) {
  		
  		for(int i = 0;i<=s.length()/2;i++) {
  			if(s.charAt(i)!=s.charAt(s.length()-1-i)) {
  				return false;
  			}
  		}
  		return true;
  	}
  	public static long logBase2(long n) {
  		long ans = 0;
  		while(n>1) {
  			ans ++;
  			n/=2;
  		}
  		return ans;
  	}
  	public static double getmostLeft(ArrayList<Circle> list) {
  	        double min = Double.MAX_VALUE;
  	        for (Circle c: list) {
  	            min = Math.min(min, c.x - c.r);
  	        }
  	        return min;
  	    }
   
  	   public static double getmostRight(ArrayList<Circle> list) {
  	        double max = Double.MIN_VALUE;
  	        for (Circle c: list) {
  	            max = Math.max(max, c.x + c.r);
  	        }
  	        return max;
  	    }
  	static class Circle{
  		double x ;
  		double y ;
  		double r;
  		int id;
  		public Circle(double x, double y, double r) {
  			this.x = x;
  			this.y = y;
  			this.r = r;
  			
  		}
  		public String toString () {
  			return x +" "+y+" "+r;
  		}
  		public boolean intersect(Circle o) {
  			double dist = Math.sqrt((y-o.y)*(y-o.y)+(x-o.x)*(x-o.x));
  			if(dist<=r+o.r) {
  				return true;
  			}
  			return false;
  		}
  		public  Circle combine( Circle o) {
  			double dist = Math.sqrt((y-o.y)*(y-o.y)+(x-o.x)*(x-o.x));
  		    if(Math.abs(r-o.r)>=dist) {
  		    	if(r>=o.r) {
  		    		return this;
  		    	}
  		    	else {
  		    		return o;
  		    	}
  		    }
   
  			double cx = (x+o.x)/2.0;
  			double cy = (y+o.y)/2.0;
  			double rad = (dist +r +this.r)/2.0;
  			return new Circle (cx, cy, rad);
  		}
  	}
  	static class Pair {
  		int x;
  		int y;
  		public Pair (int x, int y) {
  			this.x = x;
  			this.y = y;
  			
  		}
  		public boolean equals(Object o) {
              if (this == o) return true;
              if (o == null || getClass() != o.getClass()) return false;
              Pair triple = (Pair) o;
              return x == triple.x &&
                      y == triple.y ;
          }
  	}
  	public static String solve (String s) {
  		Stack <String> st = new Stack<String>();
  		for(int i = 0;i<s.length();i++) {
  			if(s.charAt(i)==']') {
  				String toEncode = "";
  				while(!st.isEmpty()&&!st.peek().equals("[")) {
  					toEncode = st.pop()+ toEncode;
  				}
  				st.pop();
  				String toPush = "";
  				int freq = Integer.parseInt(st.pop());
  				while(freq-->0) {
  					toPush+=toEncode;
  				}
  				st.push(toPush);
  			}
  			else {
  				st.push(s.charAt(i)+"");
  			}
  			
  		}
  		String res = "";
  		while(!st.isEmpty()) {
  			res = st.pop() +res;
  		}
  		return res;
  	}
  	static String alph = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
   
  	static String s;
  	static ArrayList <Integer> prime;
  	 static void simpleSieve(int limit)
  	    {   
  	        // Create a boolean array "mark[0..n-1]" and initialize
  	        // all entries of it as true. A value in mark[p] will
  	        // finally be false if 'p' is Not a prime, else true.
  	        boolean mark[] = new boolean[limit+1];
  	         
  	        for (int i = 0; i < mark.length; i++)
  	            mark[i] = true;
  	      
  	        for (int p=2; p*p<limit; p++)
  	        {
  	            // If p is not changed, then it is a prime
  	            if (mark[p] == true)
  	            {
  	                // Update all multiples of p
  	                for (int i=p*p; i<limit; i+=p)
  	                    mark[i] = false;
  	            }
  	        }
  	      
  	        // Print all prime numbers and store them in prime
  	        for (int p=2; p<limit; p++)
  	        {
  	            if (mark[p] == true)
  	            {
  	                prime.add(p);
  	               // System.out.print(p + "  ");
  	            }
  	        }
  	    }
   
  	 
  	 public static long gcd (long a, long b ) {
  		 if(b==0) {
  			 return a;
  		 }
  		 else {
  			 return gcd (b, a%b);
  		 }
  	 }
  	 
   static class Scanner {
   		StringTokenizer st;
   		BufferedReader br;
    
   		public Scanner(InputStream s) {
   			br = new BufferedReader(new InputStreamReader(s));
   		}
          public Scanner(FileReader r) {
          	br = new BufferedReader(r);
          }
   		public boolean hasNext() {
   			// TODO Auto-generated method stub
   			return false;
   		}
    
   		public String next() throws IOException {
   			while (st == null || !st.hasMoreTokens())
   				st = new StringTokenizer(br.readLine());
   			return st.nextToken();
   		}
    
   		public int nextInt() throws IOException {
   			return Integer.parseInt(next());
   		}
    
   		public long nextLong() throws IOException {
   			return Long.parseLong(next());
   		}
    
   		public String nextLine() throws IOException {
   			return br.readLine();
   		}
    
   		public double nextDouble() throws IOException {
   			String x = next();
   			StringBuilder sb = new StringBuilder("0");
   			double res = 0, f = 1;
   			boolean dec = false, neg = false;
   			int start = 0;
   			if (x.charAt(0) == '-') {
   				neg = true;
   				start++;
   			}
   			for (int i = start; i < x.length(); i++)
   				if (x.charAt(i) == '.') {
   					res = Long.parseLong(sb.toString());
   					sb = new StringBuilder("0");
   					dec = true;
   				} else {
   					sb.append(x.charAt(i));
   					if (dec)
   						f *= 10;
   				}
   			res += Long.parseLong(sb.toString()) / f;
   			return res * (neg ? -1 : 1);
   		}
    
   		public boolean ready() throws IOException {
   			return br.ready();
   		}
    
   	}
  }