Go: package main

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

func sliceAtoi(sa []string) ([]int, error) {
	si := make([]int, 0, len(sa))
	for _, a := range sa {
		i, err := strconv.Atoi(a)
		if err != nil {
			return si, err
		}
		si = append(si, i)
	}
	return si, nil
}

func getDigits(ary []int) (digits int) {
	sum := 0
	for _, v := range ary {
		sum += v
	}

	for sum != 0 {
		sum /= 10
		digits++
	}
	return
}

func getsTwoNumAsArray() (nums [][]int) {
	scanner := bufio.NewScanner(os.Stdin)

	for scanner.Scan() {
		str := scanner.Text()
		if str == "" {
			break
		}

		ary, _ := sliceAtoi(strings.Split(str, " "))
		nums = append(nums, ary)
	}

	return
}

func main() {
	ary := getsTwoNumAsArray()

	for _, v := range ary {
		fmt.Println(getDigits(v))
	}
}

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

int getDigits(int n) {
    int res = 0;
    while (n != 0) {
        res ++;
        n /= 10;
    }
    return res;
}

int main() {
    string line;
    while (getline(cin, line)) {
        stringstream ss(line);
        int a, b;
        ss >> a >> b;
        cout << getDigits(a + b) << endl;
    }
}

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

main(void){
    int a[3],b[3],c[3];
    
    scanf("%d %d", &a[0], &a[1]);
    scanf("%d %d", &b[0], &b[1]);
    scanf("%d %d", &c[0], &c[1]);
    
    a[0] = a[0] + a[1];
    b[0] = b[0] + b[1];
    c[0] = c[0] + c[1];
    
    for( a[3] = 0; a[0] >= 1; a[3]++) a[0] / 10;
    for( b[3] = 0; b[0] >= 1; b[3]++) b[0] / 10;
    for( c[3] = 0; c[0] >= 1; c[3]++) c[0] / 10;
    
    printf("%d\n%d\n%d\n", a[3], b[3], c[3]);

    return 0;
}

C++: #include <iostream>

int main(){
    int a,b;
    int cc=1;
    while(std::cin>>a>>b){
    
    if(a>=0&&b<=1000000){
    int e=a+b;
    int d=1;
    int f;
    
    for(int c=1;c<8;c++){
    	if(e/d>=1){
    		f=c;
		}
    	d=d*10;
	}
	std::cout<<f<<std::endl;
          
cc++;
if(cc==200){
	return 0;
}
	
}
}
return 0;
}

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

C++: #include <iostream>
#include <math.h>
using namespace std;
int main(){
	int a, b;
	cin >> a >> b;
	if(a >= 0 && b >= 0){
		int c = log10((double)a + b) + 1;
		cout << c << endl;
	}
	return(0);
}

C++: #include <stdio.h>

// 再帰関数
/*
int keta(int n) {
	if (n < 10)
		return 1;

	return keta(n / 10) + 1;
}
*/

int keta(int n) {
	int ret = 1;

	while (n > 9) {
		n /= 10;
		++ret;
	}

	return ret;
}

/*
int keta(int n) {
	int ret;
	char str[100];

	sprintf(&str[0], "%d", n);

	for (ret = 0; str[ret]; ++ret);

	return ret;
}
*/

int main() {
	int a, b, c;

	while (scanf("%d%d", &a, &b) != EOF) {
		c = a + b;
		printf("%d", keta(c));
		puts("");
	}
	return 0;
}

C++: #include<string>
#include<algorithm>
#include<iostream>
#include<cstdio>
using namespace std;
int main()
{
	int a,b;
	cin >> a>>b;
string stream ss;
  ss << number;
   string x=ss.str();
cout<<x.size()<<endl;
return 0;
}
string IntToString(int number)
{
  string stream ss;
  ss << number;
  return ss.str();
}

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

int main(void){
	int a,b,dig;
	double sum,test;
	std::cin >> a >> b;
	sum = (double)a+(double)b;
	test = floor(log(sum)/log(9.99999999));
	std::cout << test+1 << "\n";
	return 0;
}

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

int keta(int i){
	int k=1;
	while(i>=10){
		k++;
		i=i/10;
	}
	return k;
}

int main(){
	while(!cin.eof()){
	int a,b;
	cin >> a >> b;
	cout << keta(a+b) << endl;
	}
	return 0;
}

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

C++: #include<cstdio>
#include<string.h>
int main(){
   int a,b;
   char s[256],cmd[256];
   while(1){
             fgets(s,256,stdin);
             sscanf(s,"%s",cmd);
             if(strcmp(cmd,"EOF")==0){  
                        break;
             }
  
             sscanf(s,"%d %d",&a,&b);
             int c=a+b,counter=0;
             while( ((int)c/10)>=1){
                         counter++;
                         c=(int)c/10;
              }

              printf("%d\n",counter+1);
   }
  return 0;
}

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

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

C++: #include <iostream>

using namespace std;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    int a, b;
    while(cin>>a>>b) {
        a+=b;
        for(b=1; (a/=10)!=0; ++b);
        cout<<b<<'\n';
    }
    return 0;
}

C++: #include<iostream>
#include<string>
using namespace std;
int main() {
	int a, b;
	while (cin >> a >> b) {
		cout << to_string(a + b).length() << endl;
	}
}

C++: #include <stdio.h>

int main(){

long a,b,i,n;

while(scanf("%ld",&a)!=EOF){

scanf("%ld",&b);

n = a+b;

for(i=1;i<10;i++){

 n = n/10;

if(n==0) break;

}

printf("%ld\n",i);

}


}

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

int main(){
  int l[200];
  int m[200];
  
  for(int i=0;i<200;i++){
    if(cin.eof()){break;}
    cin >> l[i];
    cin >> m[i];
  } 
  
  for(int j=0;l[j]>0;j++){
  cout<< (int)log10(l[j]+m[j])+1 << endl;
  }
  return 0;
}

C++: #include <stdio.h>

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



 return 0;
}

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

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

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

int main(void){
	int a,b;
	int i;

	while(cin >> a >> b){
		i=0;
		a+=b;
		while(a>0){
			a/=10;
			i++;
		}
		cout << i << endl;
	}
	return 0;
}

C++: #include<iostream>

using namespace std;

int main()
{
	long int a = 0, b = 0;
	int i = 1;
	long int sum = 0;
	
	while(cin >> a >> b){
		sum = a + b;
		
		while(sum / 10){
			i++;
			sum %= 10;
		}
		
		cout << i << endl;
	}
	
	return 0;
}

C++: #include <iostream>
using namespace std;
int main (){
  int a;
  int b;
  int k;
  int h;
  for(;;){
  cin >>a>>b;
  k=a+b;
  h=0;
  if (k<10&&h==0){
      cout << "1"<<endl;
      h=1;
  }
  if (k<100&&h==0){
    cout << "2"<<endl;
    h=1;
      }
  if (k<1000&&h==0){
    cout << "3"<<endl;
    h=1;
      }
  if (k<10000&&h==0){
    cout << "4"<<endl;
    h=1;
      }
  if (k<100000&&h==0){
    cout << "5"<<endl;
    h=1;
      }
  if (k<1000000&&h==0){
    cout << "6"<<endl;
    h=1;
      }
  if (k<10000000&&h==0){
    cout << "7"<<endl;
    h=1;
      }
  if (k<100000000&&h==0){
    cout << "8"<<endl;
    h=1;
      }
  if (k<1000000000&&h==0){
    cout << "9"<<endl;
    h=1;
      }
  if (k<10000000000&&h==0){
    cout << "10"<<endl;
    h=1;
      }
  }
}

C++: #include <iostream>

int main(int argc, const char * argv[]) {
    
    std::string a, b ;
    
    
    while ( std::cin >> a >> b ) {
        printf("%lu\n", a.length() + b.length()) ;
    }
    
    return 0;
}

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


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