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<iostream>
#include<cmath>

int main()
{
	int a,b;

	int sum;

	while(std::cin >> a >> b)
	{
		sum=a+b;

		for(int i=1;;++i)
		{
			if(sum/(int)pow(10.0,i)==0)
			{
				std::cout << i << '\n';
				break;
			}
		}
	}
}

C++: #include <stdio.h>
#include <iostream>

int main(){
  int a, b, c;
  int i = 10;
  int num = 1;
  
  while(scanf("%d", &a)!=EOF){
    scanf("%d", &b);
    
    c = a + b;
    while(1){
      if(c/i!=0){
        num++;
        i *= 10;
      }else{
        break;
      }
    }
    std::cout << num << std::endl;
  }
  
  return 0;
}

C++: // 失敗するからこそ そこから立ち向かって行く強さがあってそんな強さが本当の強さだと私は思うから
#ifdef DAIJOBU
#include "/home/v-o_o-v/deb.h"
#define deb(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#include <bits/stdc++.h>
#define deb(x...)
#endif 

using namespace std;

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);

	int a, b;
	while(cin >> a >> b){
		int sum = a + b;
		cout << to_string(sum).size() << '\n';
	}
	return 0;
}
// Write Here

C++: #include <stdio.h>

int main(void){
	int a,b;
	int sum;
	int loop_i,loop_j;
	int cnt=0;

	while(scanf("%d %d",&a,&b) != EOF){
		sum = 0;
		sum = a+b;
		do{
			sum = sum/10;
			cnt++;
			if(sum == 0)
				break;
		}while(1);
		printf("%d\n",cnt);
	}
	return 0;
}

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

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

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

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

int main() {
	__int64 a, b, c;
	int x;
	bool flg = true;

	while (1) {
		cin>>a;
		if (a==EOF)
			break;

		c=a+b;

		x = 1;
		flg = true;
		while (flg) {
			if ((c=c/10)>0)
				x++;
			else
				flg = false;
		}
		cout<<x<<endl;
	}
	return 0;
}

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

int main(){
	int out[200];
	int n, m;
	int count = 0;
	while(cin >> n >> m){
		for(int i = 0; i < 100; i++){
			if(pow(10.0,i) <= n+m){
				out[count] = i;
				break;
			}
		}
		count++;
	}
	for(int i = 0; i < count; i++){
		cout << out[i] << endl;
	}
}

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

int main(){
  unsigned a, b;

  while( 1 )
    {
      cin >> a >> b;
      string c = to_string( a + b );
      cout << c.length() << endl;
    }

  return 0;
}

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

int main(){
  int a,b;
  while(cin>>a>>b){
    int ans;
    int tmp = a+b;
    string str = to_string(tmp);
    ans = str.size();
    cout << ans << endl;
  }
}

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

int main(void) {
    string str;
    while(getline(cin, str)) {
        int a, b;
        scanf("%d %d", &a, &b);

        int sum = a + b;

        int c = 1;
        int d = 10;
        int z = sum / d;

        while (z != 0) {
            d = d * 10;
            z = sum / d;
            c++;
        }
        printf("%d\n", c);
    }
    return 0;
}

C++: #include <iostream>
#include <stdio.h>

int main(){
	int cnt,a,b;
	while(scanf("%d %d",&a,&b)!=EOF){
		cnt=0;
		for(int i=10;;i*=10){
			if((a+b)/i==0){
				std::cout<<cnt<<'\n';
				break;
			}
			cnt++;
		}
	}
	return 0;
}

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

int main() {
    long a;
    long b;

    while(cin >> a >> b) {
        long c = a + b;

        int result = 0;
        do {
            c /= 10;
            result++;
        } while(c != 0);

        cout << result << endl;
    }

    return 0;
}

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

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

C++: #include <cstdio>
#include <cstring>

int main() {
    int a, b;
    char nah[100];
    while ( scanf("%d %d", &a, &b) != EOF ) {
          sprintf(nah, "%d", a + b);
          printf("%d\n", strlen(nah));
    }
    return 0;
}

C++: #include <iostream>

using namespace std;

int main() {
    int a, b;

    while (cin >> a >> b) {
        int c = a + b;
        int d = 0;

        while (c > 0, d++, c /= 10);

        cout << d << endl;
    }

    return 0;
}

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

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

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

using namespace std;

int main (void) {
  int a, b, c;
  char dummy[8];
  
  while(1) {
    cin >> a >> b;
  
    if(cin.eof()) return 0;

    c = a + b;

    cout << sprintf(dummy, "%d", c) << endl;
  }
  return 0;
}

C++: #include<cstdio>
#include<algorithm>
#include<cmath>

using namespace std;

int main(){
        double a, b;
        int c;
        int i, j ;
        while(scanf("%lf%lf", &a, &b) != EOF){
                c = a + b;
                for(i = 0; c != 0; i++){
                        c /= 10;
                }
                printf("%d\n", i);
        }
        return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

int a,b;

int main() {
  while (scanf("%d %d" ,&a ,&b) != EOF) {
    int i;
    a = a + b;
    while(a > 0) {
      a = a / 10;
      ++i;
    }
    
    cout << i << endl;
    
  }
}

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

int main()
{
	int c;
	double a,b;
	while(cin>>a>>b){
		c=log10(a+b)+1;
		cout<<c<<endl;
	}
}

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

int main(){
    int num1, num2;
    
    while(cin >> num1 >> num2){
        int result = 1;
        
        num1 += num2;
        
        for(;num1/10 > 0;){
            num1 /= 10;
            result++;
        }
        
        cout << result << endl;
    }
    
    return 0;
}

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

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

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

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

C++: #include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef vector<char> vc;
typedef vector<ll> vll;
typedef vector<vector<int>> vvi;
typedef vector<vector<string>> vvs;
typedef vector<vector<char>> vvc;
typedef vector<vector<bool>> vvb;
typedef pair<int,int> P;
#define vrep(v,n) for(int i=0;i<n;i++){cin >> v.at(i);} //配列vにn個の要素を入力する
#define rep(i, l, n) for (int i = l; i < (int)(n); i++)
#define repn(i, l, n) for (int i = l; i <= (int)(n); i++)
#define pb push_back 

const int mod = 1000000007;
const int inf = 1e9;

int main(){
    while(1){
        int a = -1, b = -1;
        cin >> a >> b;
        if(a == -1) break;
        string s = to_string(a + b);
        cout << s.length() << endl;
    }
}