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<stdio.h>
#include<iostream>
#include<algorithm>
using namespace std;

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

	while(1){
		cin >> a >> b;
		
		if(cin.fail()){
			break;
		}

		sum = a + b;

		if(sum >= 1000000){
			cout << 7 << endl;
		}
		else if(sum >= 100000){
			cout << 6 << endl;
		}
		else if(sum >= 10000){
			cout << 5 << endl;
		}
		else if(sum >= 1000){
			cout << 4 << endl;
		}
		else if(sum >= 100){
			cout << 3 << endl;
		}
		else if(sum >= 10){
			cout << 2 << endl;
		}
		else if(sum >= 1){
			cout << 1 << endl;
		}
		else{
			cout << 0 << 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<1174) break;
		
		//--------------
		c=a+b;
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

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

namespace
{
	int a, b;
}

int main()
{

	while (std::scanf("%u", &a) != EOF)
	{
		std::scanf("%u", &b);
		std::printf("%u\n", (int)std::log10(a + b) + 1);
	}
	return 0;
}

C++: #include<cstdio>
#include<iostream>
#include<cstring> // ??????????????????????±???????????????????
using namespace std;

int main(){
	int n;
	while( scanf("%d",&n) != EOF ){
		int a,b,s=0,l;
		char str[100];
		cin >> a >> b;

		s=a+b;
		itoa(s,str,10); // s???10?????°??§??????????????????
		l = strlen(str); // ???????????????????????????
		cout << l << "\n";
	}
}

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

int calc_digit(long long N) {
    int res = 0;
    while (N) {
        ++res;
        N /= 10;
    }
    return res;
}
int main() {
    int a,b;
    while(scanf("%d %d",&a,&b)!=EOF){
        int ans=calc_digit(a+b);
        cout<<ans<<endl;
    }
}

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 + 2][0] == -2) {
			break;
		}
	}

	CO numb E

	return 0;
}

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

using namespace std;
    
int main()
{
    int num1[3], num2[3],sum[3];
  
    for(int i = 0;i < 3;i++)
   {
       cin >> num1[i] >> num2[i];
       sum[i] = num1[i] >> num2[i];
   }
 
 
    for(int i = 0;i < 3;i++)
    {
       int n = 1;
    
       while (true)
       {
           int po = pow(10, n);
           if (!((sum[i] % po) == sum[i]))
               n++;
           else
               break;
       }
        cout << n << endl;
     }
}

C++: #include<iostream>
#include<cmath>
using namespace std;
int main() {
	int a,b,c;
	while(cin >> a >> b) {
		c = log10(a+b)+1;
		cout << c << endl;
	}
	return 0;
}

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

int main() {
	int n1, n2;
	while (cin >> n1 >> n2) cout << (int)log10(n1 + n2) + 1 << endl;
	return 0;
}

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

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

int main(){
    int a, b;
    stringstream ss;
    string s;

    while(cin >> a >> b){
        ss.clear();
        ss.str("");
        ss << a + b;
        s = ss.str();
        cout << s << endl;
        cout << s.length() << endl;
    }
    return 0;

}

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

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

   while(cin >> a >> b){
      a+=b;
      keta=1;
      while((a/=10)!=0) keta++;
      cout << keta << endl;
   }
   return 0;
}

C++: #include <stdio.h>

int main(void)
{
	unsigned int a[2];
	int i;
	int count;

	scanf("%d %d", &a[0], &a[1]);
	
	i = a[0] + a[1];
	count = 0;
	do{
		count++;
	}while((i = i/10) > 0);

	printf("%d\n", count);
	
	return 0;
	
}

C++: #include<stdio.h>
#include<math.h>
int main()
{
	int sum,a,b,count;
	while(scanf("%d%d",&a,&b)!=EOF)
	{
		sum=a+b;
		count=(int)log10(sum)+1;
		printf("%d\n",count);
	}
	return 0;
}

C++: #include<stdio.h>
int main(){
    int a,b,sum,i;
    sum=0;
    i=0;
    int tag;
    while(scanf("%d%d",&a,&b)!=EOF){
        sum=a+b;
        tag=0;
        if(sum==0) {tag=1;printf("%d",tag);break;}
        while(sum!=0){
            tag++;
            sum=sum/10;
        }
        printf("%d",tag);
    }
}

C++: #define _CRT_SECURE_NO_DEPRECATE
#include<iostream>
using namespace std;
int main()
	{
		int a, b, sum, result = 0;
		while (scanf("%d %d", &a, &b) != EOF)
		{
			result = 0;
			sum = a + b;
			while (sum > 0){
				sum /= 10;
				result++;
			}
			cout << result<<endl;
		}

		return 0;
	
}

C++: #include<iostream>
using namespace std;
int main (){
	int a,b,gou,p,i,j;
	for(i=0;i<200;i++){
		p=0;
		cin>>a>>b;
		gou=a+b;
		for(;;){
			if(gou>0){
				p++;
			}
			else{
				break;
			}
			gou=gou/10;
		}
		cout<<p<<endl;
	}
	return 0;
}

C++: #include <stdio.h>
#include <math.h>
#include <string.h>
int main(){
  int i,j,k;
  while(scanf("%d %d",&i,&j)!=EOF){
    k=i+j;
    for(i=1;i<7;i++){
      if(k<pow(10,i)){
        printf("%d\n",i);
        break;
      }
    }
  }
}

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

int main() {
	string s1;
	int a, b,c;

	cin >> a >> b;
	c = a + b;

	s1 = to_string(c);
	cout << s1.length() << endl;

	return 0;
}