Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
	"unicode/utf8"
)

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	var strs []string
	var a, b, sum int64
	var digits int
	for scanner.Scan() {
		strs = strings.Split(scanner.Text(), " ")
		a, _ = strconv.ParseInt(strs[0], 10, 64)
		b, _ = strconv.ParseInt(strs[1], 10, 64)

		sum = a + b
		// goでlen(string)はbyte数が返る
		digits = utf8.RuneCountInString(strconv.FormatInt(sum, 10))

		fmt.Printf("%d\n", digits)
	}
}

C++: #include <sstream>
#include <string>
#include <vector>
#include <map>
#include <algorithm>
#include <iostream>
#include <utility>
#include <set>
#include <cctype>
#include <queue>
#include <stack>
#include <cstdio>
#include <cstdlib>
#include <cmath>
using namespace std;

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

C++: #include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main( void ){
    int a[200],b;
    int i = 0;
    while( scanf( "%d %d",&a[i],&b ) != EOF ){
         a[i] = a[i] + b;
         i++;
    }
    for( int j = 0;j < i;j++ ){
        int n = 1;
        int nCount = 0;
        while( a[i] / n >= 1 ){
            n *= 10;
            nCount++;
        }
        printf( "%d\n",nCount );
    }
    return 0;
}

C++: #include <iostream>

using namespace std;

int main() {
	int a, b;
	string s;
	while (cin >> a >> b) {
		s = to_string(a+b);
		cout << s.size() << endl;
	}
	return 0;
}

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

int main(){
	int a,b,c;
	int ans;
	
	string cunning="71";
	
	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
//-------------
#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)
	{
		STR c = to_string(a + b);
		COUT(c.length());
	}
#ifdef _DEBUG
	while(1);
#endif // _DEBUG

	return 0;
}

C++: #include <iostream>
#include <vector>
#include <math.h>
using namespace std;
int main(){
	int a,b;
	int sum=0;
	int count=0;
	vector<int> digits;
	for(int i=0;i<200;i++){
	 cin >> a >> b;
	 sum = a + b;
	 digits.push_back(log10(sum)+1);
	}
	for(int i=0; i<digits.size();++i){
		cout << digits[i] << endl;
	}
	vector<int>().swap(digits);
	return 0;

}

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

auto main () -> int
{
    int x , y;
    while (std::cin >> x >> y)
    {
        std::cout << static_cast < int > (std::log10 (x + y)) + 1 << std::endl;
    }
}

C++: #include <iostream>

int main(){
  int a, b, c;
  int i = 1;
  int num = 0;
  
  std::cin >> a;
  std::cin >> b;
  
  c = a + b;
  while(1){
    if(c/i!=0){
      num++;
      i *= 10;
    }else{
      break;
    }
  }
  std::cout << num << std::endl;
  
  return 0;
}

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

int main(){
	int a,b,c;
	int ans;
	
	string cunning="76";
	
	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<iostream>
#include<vector>
#include<map>
#include<string>
using namespace std;

int get_digit(int num);

int main() {
	int first;
	int second;
	int data_cnt = 0;
	std::vector<int> inputs;

	while (/*(cin >> first >> second) || */(data_cnt < 200)) {
		data_cnt++;
		cin >> first >> second;
		inputs.push_back(first + second);
	}

	for (int i = 0; i < data_cnt; i++) {
		cout << get_digit(inputs[i]) << endl;
	}

	return 0;
}

int get_digit(int num) {
	unsigned digit = 0;
	while (num != 0) {
		num /= 10;
		digit++;
	}
	return digit;
}

C++: #include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
using namespace std;
typedef long long ll;
typedef vector<int> vint;
typedef pair<int, int> pint;
#define MOD 1000000007 //10^9+7
#define INF 1000000000 //10^9

int main ()
{
    string str;
    while (getline(cin,str)) {
        bool f=0;
        int a=0,b=0;
        for (int i=0; i<(int)str.length(); i++) {
            if (str[i]==' ') f=1;
            else if (!f) a=a*10+(str[i]-'0');
            else b=b*10+(str[i]-'0');
        }
        cout<<(int)log10(a+b)+1<<endl;
    }
}

C++: #include <bits/stdc++.h>
#define LL long long
//#define rep(i,n) for (int i=0;i<(n);i++)
#define rep(i,x,n) for (int i=x;i<(n);i++)
using namespace std;
int main(){
	
	cin.tie(0);
	ios::sync_with_stdio(false);
	
	int a, b;
	
	while(cin >> a >> b){
		
		int sum = a+b;
		string res = to_string(sum);
		
		cout << res.size() << endl;
	
	}
	return 0;
}

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

int main() {
	long a,b,c,ans;
	for(int i = 0; i <= 200; i++){
		cin >> a >> b;
		if(0 <= a  && b <= 1000000){
		ans = 0;
		c = a + b;
		while(c!=0){
		c = c / 10;

		++ans;
	}
	}
	cout << ans << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
int main(){
  int a, b;
  char s[100];
  while(cin >> a >> b){
    a += b;
    sprintf(s, "%d", a);
    cout << strlen(s) << endl;
  }
  return 0;
}

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

int main()
{
	int i,j ;
	while( cin >> i >> j )
	{
		int i = i + j ;
		int count ;

		while( i > 0 )
		{
			i = i / 10 ;
			count ++ ;
		}

		cout << count << endl ;
	}

	return 0 ;
}

C++: #include<iostream>
using namespace std;
int main(){
	int a,b,i,ans,sum=0;
	for(;;){
	cin>>a>>b;
	ans=a+b;
	for(i=0;ans>0;i++){
		ans=ans/10;
		sum=sum+1;
	}
	cout<<sum<<endl;
	}
	return 0;
}

C++: #include<iostream>
#include<algorithm>
#include<vector>

using namespace std;

int get(int n){
	int ret=1;
	while(1){
		if(n/10 !=0){
			ret++;
			n/=10;
		}
		else return ret;
	}
}
int main(){
	while(1){
		int a,b;
		if( !(cin>>a>>b) )break;

		int sum=a+b;
		cout<<get(sum)<<endl;
	}
	return 0;
}

C++: #include<cstdio>

int main(){
int a,b;
 while(scanf("%d%d",&a,&b)){
 print("%d\n",a+b);
}
return 0;
}