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<cstdio>
#include<vector>
using namespace std;
int main(){
	int a,b;
	while(scanf("%d %d",&a,&b)!=EOF){
		vector<char> c(255);
		printf("%d\n",sprintf(c,"%d",a+b));
	}
	return 0;
}

C++: #include <cstdio>

using namespace std;

int a,b;

int main() {
  while(scanf("%d %d", &a, &b) != EOF) {
    int c = a + b;
    int r = 0;
    while(r++, c /= 10);
    printf("%d\n", r);
  }
}

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

int main(){

	array<int, 6> t{ {10, 100, 1000, 10000, 100000, 1000000} };

	for (int i = 0; i < 200; ++i) {
		 if (!cin) {
			 break;
		 }
		 int a, b, sum;
		 cin >> a >> b;
		 
		 sum = a + b;
		 auto result = find_if(t.begin(), t.end(), [sum](const int x){return sum < x; });
		 auto output = result - t.begin() + 1;
		 cout << output << 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==101) break;
		//--------------
		c=a+b;
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

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

int main()
{
	long int a,b;
	
	while(cin >> a >> b){
		long int sum= a + b;
		int c=1;
		while(sum/=10)c++;
		cout << c << endl;
	}
	return 0;
}

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

int main()
{
  int a,b,sum,digit=0;
  try{
    while(1){
      digit = 0;
      cin >> a >> b;
      sum = a + b;
      while(sum > 0){
	sum /= 10;
	digit++;
      }
      cout << digit;
    }
  }catch(...){
    return 0;
  }
}

C++: 
#include <iostream>
int main(){
	while (true){
		int input_num[2], sum;
		int count = 0;
		std::cin >> input_num[0] >> input_num[1];
		if (std::cin.eof())
			break;
		sum = input_num[0] + input_num[1];
		while (sum){
			count++;
			sum /= 10;
		}
		std::cout << count << '\n';
	}
}

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

int main(){
    int a,b;
    while(cin >> a >> b){
        cout << to_string(a+b).size() << endl;
    }
}

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;
}