import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
	    
		String x = "";
		try {
			while ((x = in.readLine()) != null) {
				String[] ab = x.split(" ");
				int a = Integer.parseInt(ab[0]);
				int b = Integer.parseInt(ab[1]);
				String str = String.valueOf(a + b);
				System.out.println(str.length());
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
	public static void main(String[] args) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
	    
		String x = "";
		try {
			while ((x = in.readLine()) != null) {
				String[] ab = x.split(" ");
				int a = Integer.parseInt(ab[0]);
				int b = Integer.parseInt(ab[1]);
				String str = String.valueOf(a + b);
				System.out.println(str.length());
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
} Main public static void main(String[] args) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
	    
		String x = "";
		try {
			while ((x = in.readLine()) != null) {
				String[] ab = x.split(" ");
				int a = Integer.parseInt(ab[0]);
				int b = Integer.parseInt(ab[1]);
				String str = String.valueOf(a + b);
				System.out.println(str.length());
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	} main {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
	    
		String x = "";
		try {
			while ((x = in.readLine()) != null) {
				String[] ab = x.split(" ");
				int a = Integer.parseInt(ab[0]);
				int b = Integer.parseInt(ab[1]);
				String str = String.valueOf(a + b);
				System.out.println(str.length());
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	} BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); in new BufferedReader(new InputStreamReader(System.in)) String x = ""; x "" try {
			while ((x = in.readLine()) != null) {
				String[] ab = x.split(" ");
				int a = Integer.parseInt(ab[0]);
				int b = Integer.parseInt(ab[1]);
				String str = String.valueOf(a + b);
				System.out.println(str.length());
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} NumberFormatException e {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} e.printStackTrace() e.printStackTrace e catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} IOException e {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} e.printStackTrace() e.printStackTrace e {
			while ((x = in.readLine()) != null) {
				String[] ab = x.split(" ");
				int a = Integer.parseInt(ab[0]);
				int b = Integer.parseInt(ab[1]);
				String str = String.valueOf(a + b);
				System.out.println(str.length());
			}
		} while ((x = in.readLine()) != null) {
				String[] ab = x.split(" ");
				int a = Integer.parseInt(ab[0]);
				int b = Integer.parseInt(ab[1]);
				String str = String.valueOf(a + b);
				System.out.println(str.length());
			} (x = in.readLine()) != null (x = in.readLine()) x in.readLine() in.readLine in null {
				String[] ab = x.split(" ");
				int a = Integer.parseInt(ab[0]);
				int b = Integer.parseInt(ab[1]);
				String str = String.valueOf(a + b);
				System.out.println(str.length());
			} String[] ab = x.split(" "); ab x.split(" ") x.split x " " int a = Integer.parseInt(ab[0]); a Integer.parseInt(ab[0]) Integer.parseInt Integer ab[0] ab 0 int b = Integer.parseInt(ab[1]); b Integer.parseInt(ab[1]) Integer.parseInt Integer ab[1] ab 1 String str = String.valueOf(a + b); str String.valueOf(a + b) String.valueOf String a + b a b System.out.println(str.length()) System.out.println System.out System System.out str.length() str.length str String[] args args public class Main {
	public static void main(String[] args) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
	    
		String x = "";
		try {
			while ((x = in.readLine()) != null) {
				String[] ab = x.split(" ");
				int a = Integer.parseInt(ab[0]);
				int b = Integer.parseInt(ab[1]);
				String str = String.valueOf(a + b);
				System.out.println(str.length());
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
} public class Main {
	public static void main(String[] args) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
	    
		String x = "";
		try {
			while ((x = in.readLine()) != null) {
				String[] ab = x.split(" ");
				int a = Integer.parseInt(ab[0]);
				int b = Integer.parseInt(ab[1]);
				String str = String.valueOf(a + b);
				System.out.println(str.length());
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
	    
		String x = "";
		try {
			while ((x = in.readLine()) != null) {
				String[] ab = x.split(" ");
				int a = Integer.parseInt(ab[0]);
				int b = Integer.parseInt(ab[1]);
				String str = String.valueOf(a + b);
				System.out.println(str.length());
			}
		} catch (NumberFormatException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}