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<cstdio>
#include<algorithm>
using namespace std;

int main(){
    int a,b;
    int cnt=1;
    
    while(scanf(" %d %d",&a,&b)){
        cnt=1;
        int a=10;
        for(int i=1;i<9;i++){
            if((a+b)-a<=0)break;
            //cout << a << ' ' << b << '=' << a+b << endl;
            cnt++;
            a*=a;
        }
        cout << cnt << endl;
    }
    
    
    return 0;
}

C++: #include <iostream>
#include <stdio.h>
#define _USE_MATH_DEFINES
#include <cmath>
#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++: #define _CRT_SECURE_NO_WARNINGS
#define M_PI 3.14159265358979
#include <iostream>
#include <stdio.h>
#include <string>
#include <math.h>
#include<iomanip>
#include<vector>
#include<cmath>
#include <algorithm>

using namespace std;

int main(){
	int a,b;
	while (scanf("%d %d",&a,&b) != -1){
		string s = to_string(a + b);
		cout << s.length() << endl;
	}
	return 0;
}

C++: #include <iostream>
using namespace std;
int main(void)
{
    int a,b;
    cin >> a >> b;
    cout << a + b;
}

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

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

C++: #include<stdio.h>
#include<iostream.h>
int main(){
	int ab[200][2],f,i=0,a,g,k=0;
	while(cin<f){
		scanf("%d %d",&ab[i][1],&ab[i][2]);
		i++;
	}
	for(int j=0;j<i;j++){
		a=ab[j][1]+ab[j][2];
		for(g=0;;g++){
			a=a/10;
			k++;
			if(a==0){
				printf("%d\n",k);
				break;
			}
		}
		k=0;
	}
	return 0;
}

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

int main(){
        while(1){
                int a, b;
                scanf("%d%d", &a, &b);
                double temp =log10(a + b);
                cout << floor(temp) << endl;
        }
        return 0;
}

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

int main(){
  int a,b;
  int an[1000];
  int con[1000];
  int i=0,j,k;

  while(cin>>a>>b){
    an[i] =a + b;
    con[i] = 1;
    while(an[i]>1){
      an[i] /= 10;
      con[i]++;
    }
    i++;
      }
  cout<<endl;
  for(j=0;j<i;j++){
    cout<<con[j]<<endl;
  }

  return 0;

}

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

int main()
{
    int a, b;
    while (1) {

        cin >> a >> b;
        if (a == 0 && b == 0)
            break;
        int c = a + b;
        int ans = 0;
        while (c != 0)
        {
            c /= 10;
            ans++;
        }
        cout << ans << endl;
    }
    return 0;
}

C++: #include <iostream>
#include <math.h>
#include <stdio.h>
#include <string>
#include <string.h>
#include <algorithm>
#include <cmath>
#include <limits>
#include <sstream>

using namespace std;

int main (void)
{
	for (int i = 0; i < 200; i++)
	{
		int n,m;
		cin >> n >> m;
		
		int u = 0;
		u = n + m;

		stringstream str;
		str << u;
		string p = str.str();
		
		int q = 0;
		q = p.size();
		
		cout << q << endl;
	}
}

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

int main()
{
	int a, b;

	while(cin >> a >> b)
	{ 

	int sum = a + b;

	int keta;

	if (sum / 1000000 >= 1) keta = 7; 
	else if (sum / 100000 >= 1) keta = 6; 
	else if (sum / 10000 >= 1) keta = 5; 
	else if (sum / 1000 >= 1) keta = 4; 
	else if (sum / 100 >= 1) keta = 3; 
	else if (sum / 10 >= 1) keta = 2;
	else keta = 1;

	cout << keta << endl;

	}

	return 0;
}

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

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

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

using namespace std;

int main(void)
{
	int result[3];

	for(int i = 0; i < 3; i++){
		int a, b;
		scanf("%d %d", &a, &b);
		a+=b;
		int d = 1;
		a /= 10;
		while(a > 0){
			a /= 10;
			d++;
		}
		result[i] = d;
	}

	for(int i = 0; i < 3; i++){
		cout << result[i];
	}

	return 0;
}

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

int main(){
	int a,b,c;
	int ans;
	
	string cunning="7";
	
	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> 

int digit(int num) {
    int dig = 0;
    while (1) {
        dig++;
        if (num / 10 == 0) {
            break;
        }
        num /= 10;
    }
    return dig;
}

int main(void) {
    int a;
    int b;
    int dig;
    while (std::cin >> a >> b) {
        dig = digit(a + b);
        std::cout << dig << std::endl;
    }
    return 0;
}

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



int main(void){

	int a, b,sum=0,count;

	for (;cin;){//??°????????????????????°?????????
		count = 0;
		cin >> a >> b;
		sum = a + b;
		if (sum == 0){ cout << 1 << endl; }
		else if (sum != 0){

			while (sum > 9){

				sum /= 10;
				count++;

			}
			//?????°???count?????°
			cout << count + 1 << endl;
		}
	}


	return 0;
}

C++: #include<iostream>
#include<string>
using namespace std;
int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int x,y;
    for(;;){
        cin >> x >> y;
        if(cin.eof())   break;
        cout << to_string(x+y).length() << "\n";
    }
}

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

int main(){
	int i;
	int j;
	while (std::cin >> i >> j){
		int t = i+j;
		int y;
		for ( y = 1; t / static_cast<int>(pow(10, y)) > 0; ++y){}
		std::cout << y << std::endl;
	}

	return 0;
}

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

int main() {
  long long int a, b;
  cin >> a >> b;
  long long int sum = a+b;
  cout << sum << endl;
  

  int cnt = 1;
  while(sum /= 10) cnt++;

  cout << cnt << endl;
}

C++: #include<iostream>
#include<stdio.h>
using namespace std;
int main(){
  int a,b;
  int k=0;
  int s=0;
  int i;
  int ke[999]={0};
  while(cin>>a>>b){
  s=a+b;
  while(s>=10){
    s=s/10;
    ke[k]++;
  }
  k++;
}
  for(i=0;i<k;i++){
  cout<<ke[i]+1<<endl;
}
  return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
	long int a , b ;
	while (cin >> a >> b){
		int S = a + b;
		int c = 0;
		while (S){
			S /= 10;
			c = c + 1;
		}
	}
	return 0;
}

C++: #include "bits/stdc++.h"
using namespace std;
int main(){
    int a, b;
    while(cin >> a >> b){
        string sum = to_string(a + b);
        cout << sum.size() << endl;
    }     
    return 0;
}