Go: package main

import (
	"fmt"
	"strconv"
)

func main() {
	result := make([]int, 0, 200)

	for {
		var a, b int
		scanCount, _ := fmt.Scanf("%d %d", &a, &b)
		if scanCount == 2 {
			result = append(result, a+b)
		} else {
			break
		}
	}

	for _, v := range result {
		length := len(strconv.Itoa(v))

		fmt.Println(length)
	}
}

C++: #include <iostream>
#include <string>
#include <map>
#include <vector>
#include <set>
#include <iomanip>
#include <fstream>
#include <stdint.h>
#include <cmath>
#include <algorithm>
#include <utility>
#include <numeric>
using namespace std;

constexpr int INF       = 1000000000;/* 1e+9a */
constexpr int MODULO    = 1000000007;

#define REP(i,f,n) for(int i=(f); i < (n); ++i)
#define PER(i,f,n) for(int i=(n-1); i >= f; --i)

//----------------------------------
//----------------------------------
//
int digit(int n)
{
	int count = 0;
	while(n > 0)
	{
		n /= 10;
		count++;
	}
	return count;
}

signed main()
{
    ios::sync_with_stdio(false);
	int a, b;
	while(cin >> a)
	{
		cin >> b;
		cout << digit(a+b) << endl;
	}

}

C++: #include<iostream>
using namespace std;
int main(){
	int a,b,c,d=1;
	cin>>a>>b;
	c=a+b;
	while(true){
		if(c<10){
			break;
		}
		c=c/10;
		d=d+1;
	}
	cout<<d;
}

C++: #include<iostream>
#include<cmath>
using namespace std;
int main()
{
    int a,b;
    for(int i=1;i>0;)
    {
        cin>>a>>b;
        if(a!=EOF)
        {
        cout<<(int)log10(a+b)+1<<endl;
        }
        else return 0;
    }
    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()
{
int a,b,i;
i=0;
while(cin>>a>>b)
{
cin>>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 if(a+b<10000000)
{
	cout<<7<<endl;
}
}
return 0;
}

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

int main(void) {
	int a=0,b=0,n=1;
	while (scanf("%d %d",&a,&b) != EOF)
	{
		while ((a+b)>=pow(10,n))
		{
			n++;
		}
		cout << n << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <vector>
#include <list>
#include <algorithm>
#include <cmath>
#include <stack>
#include <set>
using namespace std;

#define REP(i,n) for(int (i)=0; (i)<(n); (i)++)
#define FOR(i,a,b) for(int (i)=(a); (i)<(b); (i)++)
#define PUSH(n,v) for(int i=0; i<(n); i++) {int j; cin >> j; v.push_back(j);}
#define ALL(v) v.begin(), v.end()

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

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

int main(){
  int a,b;cin>>a>>b;
  string s(to_string(a+b));
  cout<<s.size()<<endl;
  return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
int a,b,c;
int C=0;
while(cin>>a>>b){
c=a+b;
C=0;
while(c>=(10^C)){C++;}
cout<<C+1<<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 <stdio.h>
int main(void){
	int a,b;
	while(scanf("%d %d",&a,&b)!=EOF){
		int sum=a+b;
		int digit=1;
		while(sum>10){
			sum/=10;
			digit++;
		}
		printf("%d\n",digit);
	}
	return 0;
}

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

int main() {
	int a,b;
	while(std::cin >> a >> b){
		int sum = a+b;
		std::string str = std::to_string(sum);
		std::cout << str.length() << std::endl;
	}
	
	return 0;
}

C++: #include <stdio.h>

int main(){

	int a=0,b=0,x=0;

	while (scanf("%d%d", &a, &b)!=EOF){
		
		if (a + b < 1000000){
			x=6;
		}else if(a + b < 100000){
			x=5;
		}else if (a + b < 10000){
			x=4;
		}else if (a + b < 1000){
			x=3;
		}else if (a + b < 100){
			x=2; 
		}else if (a + b < 10){
			x = 1;
		}printf("%d", x); x++;
	}
	return 0;
}

C++: #include<iostream>

using namespace std;

int main(){
	
	int i;

	int a,b,sum,figure;

	cin >> a >> b;

	sum = a + b;

	
	figure = 1;
	while(sum/10!=0){
		sum = sum/10;
		figure++;
	}
	cout << figure << "\n";
	
	return 0;
}

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

using namespace std;

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

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

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

C++: #include <algorithm>
#include<iostream>
#include<vector>
#include<deque>
#include<queue>
#include<list>
#include<stack>
#include<map>
#include<set>
#include<string>
#include <sstream>
#include<bitset>

#include<stdlib.h>
#include<string.h>
#include<math.h>
#include<limits.h>

using namespace std;
const int INF = 0x7fffffff;

int gcd(int x,int y){
  int mi,ma;
  ma = max(x,y);
  mi = min(x,y);
  if(ma % mi == 0){
    return mi;
  }
  else{
    return gcd(mi,ma % mi);
  }
}

int main(){
  long ii,jj,kk;

  int a,b,d;
  char c[1000];
  while(cin >> a >> b){
    //cout << a + b;
    sprintf(c,"%d",a+b);
    cout << strlen(c) << endl;
  }
  
  return 0;
}

C++: #include<iostream>
#include<stdio.h>
using namespace std;
int main(){
  int a,b;
  int k=0;
  int s=0;
  int i;
  int ke[999]={0};
  while(scanf("%d %d",&a,&b)!=EOF){
  s=a+b;
  while(s>=10){
    s=s/10;
    ke[k]++;
  }
  k++;
}
  for(i=0;i<=k;i++){
  cout<<ke[i]+1<<endl;
}
  return 0;
}

C++: #define scanf_s scanf
#include <stdio.h>
#include <iostream>
using namespace std;
#define MAX 201
int main(void)
{
	int a, b, i, sum, cou = 0;
	int ans[MAX] = { 0 };
	while (scanf_s("%d %d", &a, &b) != EOF) {
		sum = a + b;
		++ans[cou];
		if (sum != 0){
			while (1) {
				if (sum <= 1) break;
				sum /= 10;
				++ans[cou];
			}
		}
		++cou;
	}
	for (i = 0; i < cou; ++i) {
		if (i != 0) printf("\n");
		printf("%d", ans[i]);
	}
}

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

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

int calcdigit(int c){
	int res=1;
	bool flg=true;
	while(flg){
		if(c/10==0){
			break;
		}
		++res;
		c=c/10;
	}
	return res;

}
int main() {
    clock_t cTimeStart, cTimeEnd;
    cTimeStart = clock();           // 現在時刻
    int a,b;
   	while(1){
   		cin>>a>>b;
	    cout<<calcdigit(a+b)<<endl;
   		if(cin.eof()){break;}
   	}


    cTimeEnd = clock();           // 現在時刻
//    cout<< "処理時間:" <<(cTimeEnd - cTimeStart)/1000 << "[ms]" << endl;

	return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
int a, b;
int main() {
	while(cin >> a >> b) {
		cout << (int)(log10(a + b)) + 1 << endl;
	}
}

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

C++: #include <iostream>
#include <sstream>
#include <string>
using namespace std;
int main(void){
	int n , i , j , k ;
		cin >> j >> k ;
		int x = j+k;
		stringstream str;
		str << x ;
		string st = str.str();
		cout << st.size() << endl;
}

C++: while line = gets do
    p ->(l){(l[0]+l[1]).to_s.size}.call line.split(' ').map(&:to_i)
end