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<stdio.h>
#include<stdlib.h>
#include<iostream>
#include<string>
#include<vector>
#include<math.h>
#include<queue>
#include <algorithm>
#include<functional>
#include<cstdlib>
#include<cmath>

#define REP(i, n) for(int i = 0;i < n;i++)
#define REPR(i, n) for(int i = n;i >= 0;i--)
#define FOR(i, m, n) for(int i = m;i < n;i++)
#define FORR(i, m, n) for(int i = m;i >= n;i--)
#define CI cin >>
#define CO cout <<
#define E << endl;

using namespace std;

typedef pair<int, int> P;
typedef pair<long, long> LP;
typedef pair<int, P> PP;
typedef pair<long, LP> LPP;



int dy[] = { 0, 0, 1, -1, 0 };
int dx[] = { 1, -1, 0, 0, 0 };

int A = 0, B = 0, K = 0, T = 0, W = 0, N = 0, H = 0;
int n = 0;
double L = 0;
double S = 0;
double ar = 0, br = 0, cr = 0;
int answer = 0;

string C;
string sA, strB;
vector<vector<char>> map;
vector<double> num;
vector<string> str;

int sum = 0;

vector<int> value;
vector<int> weight;

int dp[110][10010];

int data_[210][2] = {-2};

void input() {
	int i = 0;

	while (CI data_[i][0] >> data_[i][1]) {
		i++;
	}

	return;
}


int main(void) {
	input();
	int i = 0;
	int sum = 0;
	int numb = 0;

	while (true) {
		sum = data_[i][0] + data_[i][1];
		while (sum != 0) {
			numb++;
			sum /= 10;
		}
		if (data_[i + 1][0] == -2) {
			break;
		}
	}

	CO numb E

	return 0;
}

C++: #include <iostream>

using namespace std;

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

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;

}

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

using namespace std;

int main()
{
	int a, b;
	while (cin >> a){
		cin >> b;
		int sum = a + b;
		stringstream ss;
		ss << sum;
		string str(ss.str());
		cout << str.size() << endl;
	}
}

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

 int digit(int a)
 {
  int count=0;
  while (a)
  {
    a/=10 ;
    count++;
  }
  return count;
}

int main(){
  int x, y;
  while( cin >> x >> y && x != EOF)
        cout << digit(x+y) << endl;
}

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

int get_digit(int num);

template < typename T > std::string to_string(const T& n)
{
	std::ostringstream stm;
	stm << n;
	return stm.str();
}

int main() {
	int first;
	int second;
	int data_cnt = 0;
	std::vector<int> inputs;

	while ((cin >> first >> second) || (data_cnt < 200)) {
		data_cnt++;
		inputs.push_back(first + second);
	}

	for (int i = 0; i < data_cnt; i++) {
		cout << get_digit(inputs[i]) << endl;
	}

	return 0;
}

int get_digit(int num) {
	return std::to_string(num).length();
}

C++: #define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cmath>

using namespace std;

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

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

using namespace std;

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

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

using namespace std;

int main(){
	double i,j;

	while(cin >> i >> j) {
		cout << floor(log10(i + j) + 1) << endl;
	} 
	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==104) break;
		//--------------
		c=a+b;
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

C++: #include<stdio.h>
#include<iostream>
using namespace std;
int main(){
	int a = 0, b = 0;
	int v;
	int i = 0;
	while (scanf("%d %d",&a,&b)!= EOF){
		int c = a + b;
		if (a + b < 10){
			cout << "1" << endl;
		}
		else if (a + b < 100){
			cout << "2" << endl;
		}
		else if (a + b < 1000){
			cout << "3" << endl;
		}
		else if (a + b < 10000){
			cout << "4" << endl;
		}
		else if (a + b < 100000){
			cout << "5" << endl;
		}
		else if (a + b < 1000000){
			cout << "6" << endl;
		}
		else{
			cout << "7" << 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;
    int count = 1;
    rep(i,0,6){
       if((a /= 10) > 0){
         a /= 10;
         count++;
       }
    }
    printf("%d",count);
  }
  return 0;
}

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

int main(){
int a,b;

while(scans(" %d %d",&a,&b){
int cnt=1;
for(int i=1;i<8;i++){
if(a+b-i*10<0)break;
cnt++;
}

cout << ont << endl;

return 0;
}

C++: #include <iostream>
using namespace std;
void digitNumber()
{
	int a, b;
	while (cin >> a)
	{
		cin >> b;
		int sum = a + b;
		int count = 0;
		while(sum > 0)
		{
			sum /= 10;
			count++;
		}

		cout << count << endl;
	}
}


int main()
{
	digitNumber();
	return 0;
}

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

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

int main(int argc, const char *argv[]) {
    for (int a, b; std::cin >> a >> b; ) {
        std::cout << (int)(std::log10((double)a + b) + 1) << std::endl;
    }
    return 0;
}