Go: package main

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

var sc = bufio.NewScanner(os.Stdin)

func main() {
	for sc.Scan() {
		s := strings.Split(sc.Text(), " ")
		a, _ := strconv.Atoi(s[0])
		b, _ := strconv.Atoi(s[1])
		fmt.Println(len(fmt.Sprint(a + b)))
	}
}

C++: #include<iostream>
#include<math.h>

using namespace std;

int countDigit(int num){
	int i;
	for(i=1;pow(10,i)<=num;i++);
	return i;
}

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

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

int a,b;

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

int dainyuu() {
  cin >> a >> b;
}

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

int get_digit(int num);

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) {
	unsigned digit = 0;
	while (num != 0) {
		num /= 10;
		digit++;
	}
	return digit;
}

C++: #include<iostream>
#include<queue>
#include<string>
#include<stack>
#include<cstdio>
#include<algorithm>

using namespace std;

int main(void)
{
  int i=0;
  int x=0,y=0;
  int sum=0;

  while(scanf("%d %d",&x, &y)!=EOF)
    {
      sum=x+y;
      i=1;
      while(sum>=10)
        {
          sum/=10;
          i++;
	}

      printf("%d\n", i);
    }
}

C++: #include<iostream>
#include<string>
#include<algorithm>
#include<map>
#include<set>
#include<utility>
#include<vector>
#include<cmath>
#include<cstring>
#include<cstdio>
#define loop(i,a,b) for(int i=a;i<b;i++) 
#define rep(i,a) loop(i,0,a)
#define rp(a) while(a--)
#define pb push_back
#define mp make_pair
#define all(in) in.begin(),in.end()
const double PI=acos(-1);
const double EPS=1e-10;
using namespace std;
typedef long long ll;
typedef vector<int> vi;
bool h[1000010]={false};
int main(){
	int a,b;
	while(cin>>a>>b){
		int c=a+b;
		int co=0;
		while(c){
			co++;
			c/=10;
		}
		cout<<co<<endl;
	}
}

C++: /*************************************************************************
	> File Name: qq.cpp
	> Author: ralph
	> Mail: 1694487365@qq.com
	> Created Time: 2018年12月21日 星期五 21时08分50秒
 ************************************************************************/

#include<bits/stdc++.h>
using namespace std;
int s[12];
int main()
{
    int a,b;
    while(cin>>a>>b)
    {
        int ans=0,now=a+b;
        while(now)
        {
            now/=10;
            ans++;
        }
        cout<<ans<<endl;
    }
}

C++: #include <stdio.h>

int main()
{
        int a, b, s, i, ii;

        while( EOF != scanf("%d %d", &a, &b) ){
                s = a + b;
                for(i=1, ii=0; i<=10000000; i*=10, ii++){
                        if( s < i ){
                                printf("%d\n", ii);
                                break;
                        }
                }
        }

        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==102) break;
		//--------------
		c=a+b;
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

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

int main(){
	int c,i,j ;
	//int c[3];
	int a[10],b[10],d[10];

	for(j=0;j<3;j++){

	cin >> a[j] >> b[j] ;

	c = a[j] + b[j] ;

	//桁数計算の処理
	for(i=1;i<7;i++){
		c = c / 10 ;
		if(c == 0){
			d[j] = i ;	
			break;
		}
	}
	}

	for(i=0;i<3;i++){
		cout << d[i] << endl ;
	}

	

    return 0;
}

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

using namespace std;
main(){
	int a,b;
	while(cin >> a >> b){
	int s=1;
	int g=0;
	int d=a+b;
	while(d >= 1){
		d=d/10;
		g=g+1;
		}
		printf("%d\n",g);
	}
}

C++: #include<bits/stdc++.h>
using namespace std;
#define all(vec) vec.begin(),vec.end()
typedef long long int ll;
typedef pair<int,int> P;
typedef pair<P,P> PP;
const ll MOD=10000;
const ll INF=1000000000;
const int MAX=100001;
int dx[4]={0,1,0,-1};
int dy[4]={1,0,-1,0};
ll keta(ll n){
    int d=0;
    while(n>0){
        n/=10;
        d++;
    }
    return d;
}
int main(){
    int a,b;
    while(cin>>a>>b){
    cout<<keta(a+b)<<endl;
    }
    return 0;
}

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

int main(int argc, char* argv[])
{
	ifstream fin(argv[1]);
	int a,b;
	int count;
	int wa;
	while(!fin.eof()){
		fin >> a >> b;
		count = 1;
		wa = a + b;
		while(wa/10 != 0){
			count++;
			wa /= 10;
		}
		cout << count << endl;
	}
	return 0;
}

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

int main()
{
  long n1, n2;
  int ans = 0;
  while(cin >> n1 >> n2){
    long sum = n1 + n2;
    ans = 0;
    while(sum > 0){
      sum /= 10;
      ans++;
    }
    ans = (n1 == 0 & n2 == 0) ? 1 : ans;
    cout << ans << endl;
  }
}

C++: #include<stdio.h>
int main()
{
while(true)
	{
		int a,b;
		scanf("%d %d",&a,&b);
		if(a==EOF || b==EOF)
			break;

		int temp=a+b;
		int ans=1;
		while((temp/=10)>=10)
		{
			ans++;
		}
	printf("%d\n",ans);
	}
}

C++: #include<iostream>
#include<cstdio>
#include<string>
int main(){
    int a, b;
    while(~scanf("%d%d", &a, &b)){
        string s = to_string(a+b);
        printf("%d\n", s.length());
    }
}

C++: //泥臭いなあ
#include <iostream>
#include <cstdio>

int main()
{
        using namespace std;
        long int a,b;
        unsigned long int div;

        cin >> a >> b;
        div = (a+b)/10;

        if(div == 0)cout << 1;
        else if(1 <= div && div <= 9)cout << 2 ;
        else if(10 <= div && div <= 99)cout << 3;
        else if(100 <= div && div <= 999)cout << 4;
        else if(1000 <= div && div <= 9999)cout << 5;
        else if(10000 <= div && div <= 99999)cout << 6;
        else if(100000 <= div && div <= 200000)cout << 7;

        return 0;
}

C++: #include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<iostream>
#include<cstring> // ??????????????????????±???????????????????
using namespace std;

int main(){
	int a,b,s=0,l;
	while( cin >> a >> b  ){
		char str[100];
		s=a+b;
		itoa(s,str,10); // s???10?????°??§??????????????????
		l = strlen(str); // ???????????????????????????
		cout << l << "\n";
	}
	return 0;
}

C++: #include <iostream>
using namespace std;
int main()
{
	int a,b;
	while (1){
		cin >> a;
		if (a == EOF) break;
		cin >> b;
		cout << a + b << endl;
	}
}

C++: #include<iostream>

int main(void){
	int a,b,c,count=1;
	std::cin >> a >> b;
	c = a+b;
	do{
		c = c/10;
		count++;
	}while(c>1);
	std::cout << count << std::endl;
	return 0;
}

C++: #include <iostream>
int main()
{
    int a;
    int b;
    while(std::cin >> a >> b)
    {
        int number = 1;
        int data = a + b;
        for(int i = 0;;i++)
        {
            if(data / 10 != 0)
            {
                number += 1;
                data /= 10;
            }
 
            else if(data / 10 == 0)
            {
                break;
            }
        }
        std::cout << number << '\n';
    }
}

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

int main(){
	int a,b,c;
	int ans;
	int cnt=-1;
	
	while(cin>>a>>b){
		cnt++;
		//-----test-----
		if(cnt==0){cout<<4<<endl;continue;}
		
		//--------------
		c=a+b;
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

C++: /* AOJ0002 Digit Number */

#include <stdio.h>

int sum_digits(int n, int base)
{
    int count = 0;

    while(n) {
        count++;
        n /= base;
    }

    return count;
}

int main(void)
{
    int a, b;

    while(~scanf("%d%d", &a, &b))
        printf("%d\n", sum_digits(a + b, 10));

    return 0;
}