# -*- coding:utf-8 -*-
 
def main():
    while True:
        try:
            IN=input()
            if IN=="":
                raise EOFError
            else:
                val=IN.split(" ")
                a=int(val[0])+int(val[1])

                i=1
                flag=True
                while flag:
                    a=a/10
                    if a<1:
                        flag=False
                    else:
                        i+=1

            print(i)
        except EOFError:
            break
  
if __name__ == '__main__':
    main() def main():
    while True:
        try:
            IN=input()
            if IN=="":
                raise EOFError
            else:
                val=IN.split(" ")
                a=int(val[0])+int(val[1])

                i=1
                flag=True
                while flag:
                    a=a/10
                    if a<1:
                        flag=False
                    else:
                        i+=1

            print(i)
        except EOFError:
            break
   main while True:
        try:
            IN=input()
            if IN=="":
                raise EOFError
            else:
                val=IN.split(" ")
                a=int(val[0])+int(val[1])

                i=1
                flag=True
                while flag:
                    a=a/10
                    if a<1:
                        flag=False
                    else:
                        i+=1

            print(i)
        except EOFError:
            break
   True try:
            IN=input()
            if IN=="":
                raise EOFError
            else:
                val=IN.split(" ")
                a=int(val[0])+int(val[1])

                i=1
                flag=True
                while flag:
                    a=a/10
                    if a<1:
                        flag=False
                    else:
                        i+=1

            print(i)
        except EOFError:
            break
   except EOFError:
            break
   break IN=input() IN input() input if IN=="":
                raise EOFError
            else:
                val=IN.split(" ")
                a=int(val[0])+int(val[1])

                i=1
                flag=True
                while flag:
                    a=a/10
                    if a<1:
                        flag=False
                    else:
                        i+=1

             IN=="" IN "" raise EOFError EOFError val=IN.split(" ") val IN.split(" ") IN.split IN split " " a=int(val[0])+int(val[1]) a int(val[0])+int(val[1]) int(val[0]) int val[0] val 0 int(val[1]) int val[1] val 1 i=1 i 1 flag=True flag True while flag:
                    a=a/10
                    if a<1:
                        flag=False
                    else:
                        i+=1

             flag a=a/10 a a/10 a 10 if a<1:
                        flag=False
                    else:
                        i+=1

             a<1 a 1 flag=False flag False i+=1 i 1 print(i) print i if __name__ == '__main__':
    main() __name__ == '__main__' __name__ '__main__' main() main def main():
    while True:
        try:
            IN=input()
            if IN=="":
                raise EOFError
            else:
                val=IN.split(" ")
                a=int(val[0])+int(val[1])

                i=1
                flag=True
                while flag:
                    a=a/10
                    if a<1:
                        flag=False
                    else:
                        i+=1

            print(i)
        except EOFError:
            break
   def main():
    while True:
        try:
            IN=input()
            if IN=="":
                raise EOFError
            else:
                val=IN.split(" ")
                a=int(val[0])+int(val[1])

                i=1
                flag=True
                while flag:
                    a=a/10
                    if a<1:
                        flag=False
                    else:
                        i+=1

            print(i)
        except EOFError:
            break
   main
# -*- coding:utf-8 -*-
 
def main():
    while True:
        try:
            IN=input()
            if IN=="":
                raise EOFError
            else:
                val=IN.split(" ")
                a=int(val[0])+int(val[1])

                i=1
                flag=True
                while flag:
                    a=a/10
                    if a<1:
                        flag=False
                    else:
                        i+=1

            print(i)
        except EOFError:
            break
  
if __name__ == '__main__':
    main()