Go: package main

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

var sc = bufio.NewScanner(os.Stdin)

func Sliceconvtoi() []int {
	strs := strings.Split(sc.Text(), " ")

	var ints []int
	var x int

	for _, s := range strs {
		x, _ = strconv.Atoi(s)
		ints = append(ints, x)
	}

	return ints
}

func main() {
	for sc.Scan() {
		i := Sliceconvtoi()
		fmt.Println(int(math.Log10(float64(i[0]+i[1]))) + 1)
	}

}

C++: #include<iostream>
using namespace std;
int main(){
    int a[1000000],b[1000000],i,j;
    for(i=0;i<200;i++){
        cin>>a[i]>>b[i];
        if(a[i]+b[i]<=0){
            break;
        }
        if(a[i]+b[i]<10){
            cout<<"1"<<endl;
        }
        else if(a[i]+b[i]<100){
            cout<<"2"<<endl;
        }
        else if(a[i]+b[i]<1000){
            cout<<"3"<<endl;
        }
        else if(a[i]+b[i]<10000){
            cout<<"4"<<endl;
        }
        else if(a[i]+b[i]<100000){
            cout<<"5"<<endl;
        }
        else if(a[i]+b[i]<1000000){
            cout<<"6"<<endl;
        }
        else if(a[i]+b[i]<=1999999){
            cout<<"7"<<endl;
        }
    }
    return 0;
}

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

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

C++: #include <iostream>

using namespace std;

int getDigitNumber(int n){
  return n > 0 ? 1 + getDigitNumber(n / 10) : 0;
}

int main(int argc, char const *argv[]) {
  while(true){
    int a,b;
    cin >> a >> b;
    cout << getDigitNumber(a+b) << endl;
  }
  return 0;
}

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

int main(){ 
    int a,b,cnt,i,j;

    while(cin>>a>>b){
        int add=a+b;
        cnt = 1;
        j = 10; 
        while(1){
            i = add - j;
            if(i>=0)cnt++;
            else break;
            j *= 10;
        }       
        cout << cnt << endl;
    }
    return 0;
}

C++: #include <cstdio>
int main(){
 int d,n,a,b; 
 while(true){
  d=0;
  if (scanf("%d %d",&a,&b)==0) break;
  n=a+b;
  while(n>0) { d++, n/=10 };
  printf("%d\n",d);
  return 0;
};

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

int main(){
	int a,b,c;
	int ans;
	
	string cunning="77";
	
	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>
using namespace std;

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

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

int main(){

int i,d,n1,n2,sum,c;


   cout << "データセットの数を入力してください。(データセットの数 <= 200):";
   cin >> d;
   while(d <= 0 or d >= 200){
       cout << "データセットの数 <= 200を満たしておりません。もう一度入力してください。\n";  
       cout << "データセットの数を入力してください。(データセットの数 <= 200):";
       cin >> d;
   }

int a[d],b[d];



//入力
for(i=0; i<d; i++){
   cout << "整数a,bを入力してください。(0<=a,b<=1000000):";
   cin >> n1 >> n2;
   
   if(n1 >= 0 and n1 <= 1000000 and n2 >= 0 and n2 <= 1000000){
       a[i]=n1;
       b[i]=n2;
   }else{
   cout << "入力した整数が条件をを満たしておりません。もう一度入力してください。\n";
   i--;
   }
}


    
//出力
cout << "データセット数は" << d <<"\n";

cout << "result\n";
for (i = 0; i < d; i++) {
     c=0;
     sum=a[i]+b[i];
     while((sum/10)!=0){
         c++;
         sum=sum/10;
     }
   cout << c+1 << "\n";
}

    return 0;
}

C++: #include<iostream>
using namespace std;
int main()
{
	long long a,b;
	while(cin>>a>>b)
	{
		int c=a+b;
		int n=0;
		while(c>0)
		{
			c=c/10;
			n++;
		}
		cout<<n<<endl;
	}
	return 0;
}

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

int main(){
	int a,b,c;
	int ans;
	int cnt=-1;
	
	while(cin>>a>>b){
		cnt++;
		//-----test-----
		if(a<1170) break;
		
		//--------------
		c=a+b;
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

C++: #include <iostream>
  
u_int getDigit(u_int n){
    u_int digit = 0;
      
    while(n > 0){
        n /= 10;
        ++digit;
    }
      
    return digit;
}
    
int main(){
    u_int a, b;
      
    while(std::cin >> a >> b){
        std::cout << getDigit(a + b) << std::endl;
    }
      
    return 0;
}

C++: #include <bits/stdc++.h>
// #include "bits/stdc++.h"

#define pout(n)  printf ("%d\n", n)

#define rep(i,a,n) for (int i = a;i < n;i++)
#define per(i,n,a) for (int i = n-1;i >= a;i--)

const int d4x[4] = {1, 0, -1, 0};
const int d4y[4] = {0, 1, 0, -1};
const int d8x[8] = { 1,1,0,-1,-1,-1,0,1 };
const int d8y[8] = { 0,1,1,1,0,-1,-1,-1 };
 
typedef long long ll;
using namespace std;
 
int main() {
  ll a,b;
  while(cin >> a >> b){
    a += b;
    ll count = 0;
    
    while((a /= 10) > 0){
       a /= 10;
      count++;
    }
    
    printf("%lld",count);
  }
  return 0;
}

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

int main() {
	int a,b;
	while (cin >> a >> b) {
		int n = 1;
		int sum = a+b;
		while (sum / 10 >= 1){
			n++;
			sum /= 10;
		}
		cout << n << endl;
	}
}

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

using namespace std;

int main()
{
	int a,b, ans;
	string sum;
	while(cin >> a >> b)
	{
		ans = a + b;
		sum = static_cast<string>(sum);
		cout << sum.size();
	}
	return 0;
}

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

int main(void)
{
  string s;
  int a,b;
  vector<int> array;
  int i=0;
  while(cin>>a,b)
    {
      s=a+b;
	 // c=(int)s.size();
      array.push_back(s.size());
    }

  while(i<array.size())
    {
      cout<<array[i]<<endl;
    }

}

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 <iostream>

using namespace std;

int main() {

  int a,b;
  int sum;
  int count;

  while(cin >> a >> b) {

    count=0;

    sum=a+b;

    while(sum>0) {

      sum/=10;

      count++;

    }

    cout << count << endl;

  }

}

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

int main(void){
	int a,b,dig,i;
	double sum;
	std::cin >> a >> b;
	sum = (double)a+(double)b;
	dig = floor(log(sum)/log(10.0));
	std::cout << dig+1 << "\n";
	return 0;
}

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

int main(){
	int a,b,c;
	int ans;
	bool flg;
	int cnt=-1;
	
	while(cin>>a>>b){
		cnt++;flg=false;
		//-----test-----
		if(cnt==103) break;
		//--------------
		c=a+b;
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

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


int digit( int n ){
    int d = 0;
    while( n != 0 ){
        n /= 10;
        d++;
    }
    return d;
}

int main(){
    string str;
    while (getline(cin, str)) {
        istringstream stream(str);
        int a, b;
        stream >> a >> b;
        cout << digit(a+b) << endl;
    }

    return 0;
}

C++: #include<iostream>
#include<string>
#include <algorithm>
#include<iomanip>
#include<cmath>
using std::cin; using std::string;
using std::cout; using std::endl;
using std::sort;
#define rep(X,Y) for(int (X)=0;(X)<(Y);++(X))
#define rept(X,Y,Z) for(int (X)=(Y);(X)<(Z);++(X))
#define repr(X,Y) for(int (X)=(Y);(X)>=0;--(X))
const double pi=3.141592653589793283462;
int main(){
    int a,b,c;
	while(cin>>a>>b){
	int co=1;
	c=a+b;
	while(1){
		if(c/10>=1){
			co+=1;
			c/=10;
		}
		else
			break;
	}
	cout<<co<<endl;
	co=1;
	}
	return 0;
}

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

int main(){
	int a,b,c;
	int ans;
	int cnt=-1;
	
	while(cin>>a>>b){
		cnt++;
		//-----test-----
		if(a<1180) break;
		
		//--------------
		c=a+b;
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}