description: A binary string is a string that consists of characters 0 and 1.
  
  Let \operatorname{MEX} of a binary string be the smallest digit among 0, 1, or 2 that does not occur in the string. For example, \operatorname{MEX} of 001011 is 2, because 0 and 1 occur in the string at least once, \operatorname{MEX} of 1111 is 0, because 0 and 2 do not occur in the string and 0 < 2.
  
  A binary string s is given. You should cut it into any number of substrings such that each character is in exactly one substring. It is possible to cut the string into a single substring — the whole string.
  
  A string a is a substring of a string b if a can be obtained from b by deletion of several (possibly, zero or all) characters from the beginning and several (possibly, zero or all) characters from the end.
  
  What is the minimal sum of \operatorname{MEX} of all substrings pieces can be?
  
  Input
  
  The input consists of multiple test cases. The first line contains a single integer t (1 ≤ t ≤ 10^4) — the number of test cases. Description of the test cases follows.
  
  Each test case contains a single binary string s (1 ≤ |s| ≤ 10^5).
  
  It's guaranteed that the sum of lengths of s over all test cases does not exceed 10^5.
  
  Output
  
  For each test case print a single integer — the minimal sum of \operatorname{MEX} of all substrings that it is possible to get by cutting s optimally.
  
  Example
  
  Input
  
  
  6
  01
  1111
  01100
  101
  0000
  01010
  
  
  Output
  
  
  1
  0
  2
  1
  1
  2
  
  Note
  
  In the first test case the minimal sum is \operatorname{MEX}(0) + \operatorname{MEX}(1) = 1 + 0 = 1.
  
  In the second test case the minimal sum is \operatorname{MEX}(1111) = 0.
  
  In the third test case the minimal sum is \operatorname{MEX}(01100) = 2.
solution: import java.io.BufferedReader;
  import java.io.FileNotFoundException;
  import java.io.FileReader;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.util.StringTokenizer;
  import java.io.OutputStream;
  import java.io.BufferedOutputStream;
  import java.util.*;
  public class Min_Mex {
      public static void main(String[] args)throws Exception{
          FastScanner in = new FastScanner();OutputStream out = new BufferedOutputStream ( System.out );
          int t=in.nextInt();
          while(t-->0){
              String s=in.nextLine();
              ArrayList<Integer>arr=new ArrayList<>();HashSet<Character>set=new HashSet<>();
              for(int i=0;i<s.length();i++){
                  char ch=s.charAt(i);
                  set.add(ch);
                  if(ch=='0')
                      arr.add(i);
              }
              if(set.size()==1){
                  if(set.contains('0'))
                      out.write((1+"\n").getBytes());
                  else
                      out.write((0+"\n").getBytes());
              }
              else{
                  boolean flag=true;
                  for(int i=0;i<arr.size()-1;i++){
                      if((arr.get(i+1)-arr.get(i))>1){
                          flag=false;break;
                      }
                  }
                  if(flag)
                      out.write((1+"\n").getBytes());
                  else
                      out.write((2+"\n").getBytes());
              }
          }
          out.flush();
      }
      public static class FastScanner {
          BufferedReader br;
          StringTokenizer st;
  
          public FastScanner(String s) {
              try {
                  br = new BufferedReader(new FileReader(s));
              } catch (FileNotFoundException e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
              }
          }
  
          public FastScanner() {
              br = new BufferedReader(new InputStreamReader(System.in));
          }
  
          String nextToken() {
              while (st == null || !st.hasMoreElements()) {
                  try {
                      st = new StringTokenizer(br.readLine());
                  } catch (IOException e) {
                      // TODO Auto-generated catch block
                      e.printStackTrace();
                  }
              }
              return st.nextToken();
          }
  
          int nextInt() {
              return Integer.parseInt(nextToken());
          }
  
          long nextLong() {
              return Long.parseLong(nextToken());
          }
  
          double nextDouble() {
              return Double.parseDouble(nextToken());
          }
  
          String nextLine()
          {
              String str = "";
              try
              {
                  str = br.readLine();
              }
              catch (IOException e)
              {
                  e.printStackTrace();
              }
              return str;
          }
      }
  }