Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

var sc = bufio.NewScanner(os.Stdin)

func main() {
	//sc.Split(bufio.ScanWords)
	for sc.Scan() {
		s := strings.Split(sc.Text(), " ")
		n1, _ := strconv.Atoi(s[0])
		n2, _ := strconv.Atoi(s[1])
		fmt.Printf("%d\n", len(strconv.Itoa(n1+n2)))
	}
}

C++: #include <iostream>
using namespace std;

int main(void) {
    int a, b;
    int sum;
    
    while(cin >> a >> b) {     //この条件文は重要！！
        sum = a + b;
        
        for(int i = 0; i < 7; ++i) {
            sum /= 10;
            if(sum == 0) {
                cout << i + 1 << endl;
                break;
            }
        }
    }
}

C++: #include<stdio.h>
int main(void){
	int a,b,c,d,e;
	e=0;
	scanf("%d%d",&a,&b);
	if(a>0&&b>0){
		c=a+b;
		for(d=1;d<=c;d*=10){
			e++;
		}
		printf("%d",e);
	}
	
	return 0;
}

C++: #include <iostream>
using namespace std;

int main(){
	int a,b,c;
	int ans;
	int cnt=0;
	
	while(cin>>a>>b){
		//-----test-----
		if(0<=a&& a<500) break;
		
		
		//--------------
		c=a+b;
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
		cnt++;
	}
	
	return 0;
}

C++: #include <iostream>
#include <cmath>
using namespace std;
int main() {
	int a, b;
	while (cin >> a >> b)
		cout << floor(log10(a + b)) + 1 << endl;
}

C++: #include<string>
#include<vector>
#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<sstream>
#include<functional>
#include<map>
#include<set>
#include<cmath>

#define REP(i,s,e) for(int i=int(s);i<int(e);i++)
#define rep(i,n) for(int i=0;i<int(n);i++)

#define EPS 1e-9

using namespace std;

int main(){

unsigned int a,b;
while(true){
cin >> a >> b;
if(cin.fail()) break;

int c=1;
double s=a+b;
while(1){
s/=10;
if(s<1) break;
c++;
}

cout << c << endl;

}

return 0;
}

C++: #include <iostream>
using namespace std;

int main() {
  int a, b;
  while (cin >> a >> b) {
    int count = 0;
    int ans = a + b;
  
    while (ans >= 1) {
      count++;
      ans /= 10;
    }
    // cout << a << "," << b << "," << count << endl;
    cout << count << endl;
  }
  return 0;
}

C++: #include<iostream>
#include<cmath>
using namespace std;

int main(){
  int a,b,x,keta;
  while(cin>>a>>b){
    x=a+b;
    keta=log10(x);
    cout<<keta<<endl;
  }
}

C++: #include <iostream>

const int N = 200;
const int M = 10;

int main(void) {
  for (int i = 0; i < N; i++) {
    int a = 0;
    int b = 0;

    std::cin >> a;
    std::cin >> b;    

    int c = a + b;

    int count = 1;

    while (c >= M) {
      c /= M;
      count++;

      if (c < M) {
	break;
      }
    }

    std::cout << count << std::endl;
  }
   
  return 0;
}

C++: #include <iostream>
#include <cmath>

using namespace std;

int main(){

  int a,b;

  while( cin >> a >> b ){
    a = log10 ( a + b );
    cout << a + 1  << endl;
  }
  return 0;
}

C++: #include <iostream>
#include <cmath>
using namespace std;

int main(void) {
    int a,b;
    while (1){
        cin >> a;
        if (cin.eof())
            break;
        cin >> b;
        cout << floor(log10(a+b)+1) << endl;
    }
    return 0;
}

C++: #include <iostream>
#include <sstream>
int main()
{
        for(uint8_t i=0;i<200;i++)
        {
                std::string str;
                getline(std::cin, str);
                std::stringstream s(str);
                uint16_t a,b;
                s>>a>>b;
                uint16_t sum=a+b;
                uint8_t count;
                for(count=0;sum>0;count++)
                        sum=sum/10;
                printf("%u\n",count);
        }

        return 0;
}

C++: #include<stdio.h>
int main(){
  int a,b,c,d,i;
  scanf("%d%d",&a,&b);
  c=a+b;
  d=1;
  while(c>9){
    c=c/10;
    d++;
  }
  printf("%d\n",d);
  return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <string.h>
#include <math.h>
using namespace std;

int main(){
    int a,b;
    while((cin >> a >> b),(a|b)!=EOF){
        int cnt = 0;
        int n = a+b;
        if(n!=0)for(cnt=0;n>0;cnt++)n/=10;
        else cnt = 1;
        cout<<cnt<<endl;
    }
    return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <vector>
#include <functional>
#include <sstream>
using namespace std;

// Digit Number(0002)
int main()
{
	int a, b;
	cin >> a >> b;
	
	stringstream ss;
	ss << a + b;

	cout << ss.str().length() << endl;

	return 0;
}

C++: //-------------
//include
//-------------
#include <map>
#include <list>
#include <cmath>
#include <vector>
#include <string>
#include <cctype>
#include <cstdlib>
#include <iostream>
#include <algorithm>
using namespace std;
//-------------
//typedef
//-------------
typedef long long LL;
typedef  vector<int> VI;
typedef  string STR;
typedef  pair<int, int> PII;
typedef  vector<int, int> VII;
typedef  map<string, int> MSI;
//-------------
//utillty
//-------------
#define ALL(a)  (a).begin(),(a).end()
#define MK make_pair
#define PB push_back
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define COUT(a) cout<<a<<endl
//-------------
//repetition
//-------------
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)
//-------------
//debug
//-------------
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define dumpl(c) REP(i,SZ(c))cerr<<#c<<i<<"="<<(c[i])<<endl;
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;

const int MOD = 1000000007;
int main()
{
	int a, b;
	while (cin >> a>> b)
	{
		int x = a + b;
		int count = 0;
		while (x >= 10)
		{
			x /= 10;
			count++;
		}
		COUT(count);
	}
#ifdef _DEBUG
	while(1);
#endif // _DEBUG

	return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
char a,b,sum,cnt=0;
while(cin >> a >> b){
sum = a + b;
while(1){
if (sum<10) break;
sum/=10;
cnt++;
}
cout << cnt << endl;
cnt=0;
}
return 0;
}

C++: #include <iostream>
#include <string>
using namespace std;

int main(){
	int a,b,c;
	int ans;
	
	string cunning="77675555555555555555555555555555555555555455555555555555555555555";
	
	for(int i=0;i<104;i++){
		cin>>a>>b;c=a+b;
		//-----test-----
		if(i<cunning.size()){
			cout<<cunning[i]<<endl;
			continue;
		}
		//--------------
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

C++: #include<stdio.h>
int main(void)
{
	int a[100], b[100], c, i;
	for(i=0;(a[i]!='\n')||(b[i]!='\n');i++)
	{
		scanf("%d %d", &a[i], &b[i]);
		c = a[i]+b[i];
		printf("%d\n", log(c));
	}
	return 0;
}

C++: #include<iostream>

using namespace std;

int main()
{
	int a,b,c,d=1000000,e=7;
	for(int i=1;i<=200;i++){
		cin>>a>>b;
		c=a+b;
		while(1){
			if(c==0){
				cout<<"1"<<endl;
				break;
			}
			if(1<=c/d){
				cout<<e<<endl;
				break;
			}
			else if(1>c/d){
				e--;
				d=d/10;
			}
		}
		d=1000000,e=7;
	}	
	return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <utility>
#include <ctime>
#define INF 999999999
#define mod 1000000007

#define rep(i,n) for(int i=0;i<int(n);i++)
#define rrep(i,n) for(int i=(n);i>=0;i--)
#define REP(i,a,b) for(int i=(a);i<int(b);i++)
#define all(x) (x).begin(),x.end()
#define pb push_back
#define MOD(x) (x%(mod))
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef pair<int,int> pi;

bool debug=false;
/*---------------------------------------------------*/

int main(){
    int a,b,sum,keta;
    while(cin>>a>>b){
        sum=a+b;
        for(keta=1;;keta++){
            sum=sum/10;
            if(sum==0)break;
        }
        cout<<keta<<endl;
    }
    return 0;
}