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 <bits/stdc++.h>

#define int long long int
#define main signed main()
#define bye return 0
#define loop(i, a, n) for (int i = (a); i < (n); i++)
#define rep(i, n) loop(i, 0, n)
#define each(p, v) for (auto p = (v).begin(); p != (v).end(); p++)
#define all(v) (v).begin(), (v).end()
#define prec(n) fixed << setprecision(n)
#define dump(x) cerr << "(L" << __LINE__ << ") " << #x << " = " << (x) << endl
#define clr(x, a) memset(x, a, sizeof(x))

#define sum(v) accumulate(all(v), 0)
#define stlice(from, to) substr(from, (to) - (from) + 1)
#define odd(n) ((n) % 2)
#define even(n) (!odd(n))

#define INF 1000000000
#define MOD 1000000007

#define pb push_back
#define mp make_pair
#define mt make_tuple
#define fi first
#define se second
#define vi vector<int>
#define vb vector<bool>
#define vc vector<char>

using namespace std;

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

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

int main(){
  int temp,temp2;
  while(cin>>temp>>temp2){
    int sum=temp+temp2;
    int keta=1;
    while(sum/10>0){
      sum/=10;
      keta++;
    }
    cout<<keta<<endl;
  }

  return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
  int a,b;
  
  while(cin>>a>>b){
    a+=b;
    b=1;
    for(int i=1;i<=7;i++){
      b*=10;
      if(a<b){
	cout<<i<<endl;
	break;
      }
    }
  }
  return 0;
}

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

int main() {
	int a,b;
	while(scanf("%d",&a)!=EOF) {
		scanf("%d",&b);
		int total=a+b,ans=1;
		while((total/1)>10) {
			total/=10;
			++ans;
		}
		printf("%d\n",ans);
	}
	return 0;
}

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

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

int main() {
	int a = 0;
	int b = 0;

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

	return 0;
}

C++: #include<stdio.h>
int main(void)
{
	int dec1,dec2,sum,keta=0;
	scanf("%d %d",&dec1,&dec2);
	sum=dec1+dec2;
	while(sum>10){
		sum=sum/10;
		keta++;
	}
	printf("%d\n",keta+1);
	return 0;
}

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

int main()
{
    int in1, in2;
    int a[200], b[200];
    int count = 0;
    while(cin >> in1 >> in2) {
        a[count] = in1;
        b[count] = in2;
        count++;
    }

    for(int i = 0; i < count; i++) cout << (int)log10(a[i]+b[i])+1 << endl;
    
    return 0;
}

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

int main(int argc, char *argv[]){
	//std::ifstream datafile(argv[1]); //input datafile
	std::string str;
	int num1, num2; //a, b
	int sum; //a + b
	int digit = 0; //digit

	// if(datafile.fail()){
	// 	std::cout << "error : can't open this file." << std::endl;
	// 	exit(1);
	// }

	while(std::getline(std::cin, str)){
		sscanf(str.c_str(), "%d%d", &num1, &num2);

		if(num1 < 0 || num1 > 1000000 || num2 < 0 || num2 > 1000000){
			std::cout << "error : out of constraints" << std::endl;
			exit(1);
		}

		sum = num1 + num2;

		if(sum == 0){ //when sum is 0, its digit is 1
			std::cout << 1 << std::endl;
		}else{ //when sum is not 0
			while(sum != 0){
				digit++;
				sum = sum / 10;
			}
			std::cout << digit << std::endl;
			digit = 0;
		}
	}

	return 0;
}

C++: //#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
//#include <cstdio>
//#include <cstdlib>
//#include <cmath>
#include <iostream>
#include <algorithm>
//#include <cstring>
#include <vector>
#include <string>
#include <map>
#include <list>
#include <queue>
#include <set>
using namespace std;

int main(void){

	int a, b;
	
	while(cin >> a >> b){
	int num = a + b;
	int result = 0;
	
	if(num == 0) result++;
	while(num != 0){
		result++;
		num /= 10;
	}
	
	cout << result << endl;
	}

	return 0;
}

/*
for(i=0;i<N;i++){
	cin >> X[i];
}


for(i=0;i<N;i++){
	for(j=0;j<N;j++){
		cin >> X[i][j];
	}
}
*/

C++: int digits(int x)
{
  if (x < 10)
    return 1;
  else
    return 1 + digits(x / 10);
}

int main(int argc, char **argv)
{
  int a, b;
  while (cin >> a >> b) {
    cout << digits(a+b) << endl;
  }
  return 0;
}

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

int main(){
	cout << "Hello, world!" << endl;
}

C++: #include <iostream>
#include <algorithm>
#include <cstdio>
#include <string>
#include <sstream>
 
using namespace std;
 
int main(){
    int a, b;
    stringstream s;
    while(cin >> a >> b){
    s << a + b;
    cout << s.str().size() << endl;
    }
    return 0;
}

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

int main()
{
	int a,b,c;
	cin >>a >>b;
	c = a+b;
	int ret = 1;
	for(int i=1;;i++){
		if( c/pow(10,i) !=0 ){
			ret++;
		}else{
			break;
		}
	}
	cout <<ret <<endl;
    
	return 0;
}

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

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

C++: #include "iostream"
using namespace std;

int main(void)
{
    long num1, num2;

    for (int i = 0; i < 200; i++) {
        cin >> num1 >> num2;

        num1 += num2;

        num2 = 0;
        while(num1 > 0) {
            num2++;
            num1 /= 10;
        } 

        cout << num2 << endl;
    }
    
    return 0;
}

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

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

using namespace std;

int main(){
	int a,b;
while(not eof){
	}
	int n=a+b;
	if (n>99999){	
	cout<<6<<endl;
}
	else if(n>9999){
		cout<<5<<endl;
	}
		else if(n>999){
		cout<<4<<endl;
	}
		else if(n>99){
		cout<<3<<endl;
		}
		else if(n>9){
		cout<<2<<endl;
	}
	else{ 
	cout<<1<<endl;
	}
	}

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

int main(){
	int count;
	int num1,num2,sum;

	while(1){
		cin >> num1;
		if(cin.eof( ) )break;
		cin >> num2;

		count = 1;
		sum = num1+num2;

		while( (sum / 10) > 0){
			sum /= 10;
			count++;
		}
		cout << count << endl;
	}

	return 0;
}

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;
  }
  
}

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

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

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

int c = 0;

void keta(int C) {
	if (C > 9) {
		c++;
		keta(C/10);
	}
	return;
}

int main()
{
	while (1) {
		if (cin.eof)
			break;
		c = 0;
		int A, B,C;
		cin >> A>> B;
		C = A + B;
		keta(C);
		c++;
		cout << c<<endl;
	}
    return 0;
}