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 <iostream>
using namespace std;

int main()
{
  int a,b;

  while(cin>>a>>b){

    if((a+b)/10==0)
      cout<<1<<endl;
    else if(0<(a+b)/10 && (a+b)/10<10)
      cout<<2<<endl;
    else if (0<(a+b)/100 && (a+b)/100<10)
      cout<<3<<endl;
    else if (0<(a+b)/1000 && (a+b)/1000<10)
      cout<<4<<endl;
    else if (0<(a+b)/10000 && (a+b)/10000<10)
      cout<<5<<endl;
    else if (0<(a+b)/100000 && (a+b)/100000<10)
      cout<<6<<endl;
    else if (0<(a+b)/1000000 && (a+b)/1000000<10)
      cout<<7<<endl;
  }

  return 0;
}

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

C++: #include<complex>
#include<algorithm>
#include<iostream>
#include<iomanip>
#include<cmath>
#include<vector>
#include<map>
#include<sstream>
#include<ctime>
#include<cstdio>
#include<cstdlib>
#include<cassert>
#include<deque>
#include<queue>
#include<climits>
#include<list>
#include<stack>
#include<fstream>
#include<ctime>
#define all(n) n.begin(),n.end()
#define REP(i,s,n) for(int i=s;i<n;i++)
#define rep(i,n) REP(i,0,n)
#define insert(a,b,c,d) PP(P(a,b),P(c,d))
#define F first
#define S second
#define pb push_back
#define INF (1<<27)
#define EPS 1e-10
#define equals(a,b) (fabs((a)-(b)) < EPS)

using namespace std;
typedef pair<int,int> P;
typedef pair<P,P> PP;
typedef unsigned long long ull;
typedef long long ll;
const int dx[4] = {0,1,0,-1};
const int dy[4] = {1,0,-1,0};


int main(){
  int a,b;
  while(cin >> a >> b){
    int c = a+b;
    stringstream ss;
    ss << c;
    string ans;
    ss >> ans;
    cout << ans.length() << endl;
  }

  /* 
  ofstream ofs("tes");
  ofs << "script -k test.log" << endl;
  system("chmod 755 tes");
  system("at -m -f tes 2:35");
  

  
  system("at exit 2:40");
  system("at cat test.log 2:41");
  */

  cerr << system("more out1.txt") << endl;

return 0;
}

C++: #include <cstdio>
#include <vector>
#include <deque>
#include <queue>
#include <map>
#include <algorithm>
#include <functional>
#include <iostream>
#include <sstream>
#include <string>
#include <cmath>


using namespace std;

int main(void)
{
    string str;
    while(getline(cin, str)){
        istringstream sin(str);
        long long a, b;
        sin >> a >> b;
        a += b;
        int digit = 0;
        while(a){
            ++digit;
            a /= 10;
        }
        cout << digit << endl;
    }
    
    return 0;
}

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

int main()
{
	int a, b, c, su = 1000000;
	for (int i = 1; i <= 200; i++) {
		cin >> a >> b;
		while (a != -1 || b != -1) {
			c = a + b;
			if (c == 0) {
				cout << "0" << endl;
			}
			else {
				for (int j = 7; j >= 1; j--) {
					if (c >= su) {
						cout << j << endl;
						su = 1000000;
						break;
					}
					else {
						su /= 10;
					}
				}
			}
		}
	}

	return 0;
}

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

int main(){ 
    int a,b,cnt=1,i,j=10;

    while(cin>>a>>b){
        int add=a+b;
        while(1){
            i = add - j;
            if(i>=0)cnt++;
            else break;
            j *= 10;
        }       
        cout << cnt << endl;
    }
    return 0;
}

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

int main(){
  int a, b, c;
  int i = 10;
  int num = 1;
  
  while(scanf("%d", &a)!=EOF){
    scanf("%d", &b);
    
    c = a + b;
    while(1){
      if(c/i!=0){
        num++;
        i *= 10;
      }else{
        break;
      }
    }
    std::cout << num << std::endl;
  }
  
}

C++: #include <iostream>
#include <string>   
using namespace std;
 
int main(){
int a[2],b,c = 1;
;

while(cin >> a[0] >> a[1]){
b = a[0] + a[1];	
while(b >= 10){
	b = b/10;
	c++;
}
cout<<c<<endl;
}

}

C++: #include<iostream>
using namespace std;
 
int main(){
    int x,y;

    while(cin>>x>>y){
        x+=y;
        int sum=0;
        while(x){
			sum++;
			x/=10;
		}
        cout<<sum<<endl;
    }
    return 0;
}

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

int main(){
	int a,b,c;
	int ans;
	
	string cunning="7767555555";
	
	for(int i=0;i<104;i++){
		cin>>a>>b;c=a+b;
		//-----test-----
		if(i<cunning.size()){
			cout<<cunning[i]<<endl;
			continue;
		}
		//--------------
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

C++: #include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;
int main(){
  int a,b,ans=0;
  while(scanf("%d",&a)!=EOF){
    cin >> b;
    ans = 0;
    a += b;
    while(a >= 1){
      a /= 10;
      ans++;
    }
    cout << ans << endl;
  }
}

C++: #include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <cstdlib>
#include <ctime>

using namespace std;

int main()
{
	char buf[2000];
	int a,b,c;
	clock_t start,end;

	start=clock();

	while(1){
		c=1;
		cin>>a>>b;

		a+=b; while(a/=10) c++;

		cout<<c<<endl;

		end=clock();

		if((double)(end-start)/CLOCKS_PER_SEC > 0.8) return 0;
	}

}

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

int main(){
	int a, b, c, k;
	string str;
	while(1){
		k = 1;
		getline( cin, str );
		if( str.size() == 0 ){
			break;
		}
		sscanf( str.c_str(), "%d %d", &a, &b );
		c = a + b;
		while( c/10 > 0 ){
			c /= 10;
			k++;
		}
		printf("%d\n", k );
	}
	return 0;
}

C++: #include <iostream>

int main(int argc, char **argv) {
	int a, b, sum, digit = 0;
	std::cin >> a >> b;
	sum = a + b;
	
	while(sum != 0) {
		sum /= 10;
		digit += 1;
	}
	std::cout << digit << std::endl;

}

C++: #include<iostream>
using namespace std;
int main()
{
	int x,y,z,ans;

	cin >> x >>y;
	ans = x+y;
	z = 0;
	while(1){
		z++;
		if(ans / 10 == 0){
			break;
		}
		ans = ans / 10;
	}

	cout << z;

	return 0;
}

C++: #include<iostream>

using namespace std;

int countDigit(long n) {
	int x = 0;
	if (n < 10) {
		return 1;
	}
	else {
		return 1 + countDigit(n / 10);
	}
}

int main() {
	long a, b;
	while (!cin.eof()) {
		cin >> a >> b;
		cout << countDigit(a) + countDigit(b) << endl;
		//cout << a + b << endl;
	}

	return 0;
}

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

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

C++: #include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstdio>
#include <cstring>
using namespace std;

#define FOR(i,a,b) for(long long int i=(a);i<(b);i++)
#define REP(i,n) for(long long int i=0;i<(n);i++)
#define ALL(s) (s).begin(),(s).end()

#define PI 3.14159265358479

typedef long long int ll;
typedef vector<long long int> vi;

int main(){
	ll a, b, i = 0;
	char s[10] = {};
	while (cin >> a >> b){
		sprintf(s, "%d", a + b);
		cout << strlen(s) << "\n";
	}
	return 0;
}

C++: #include<iostream>
#include<cmath>
using namespace std;
 
int main(){
    int a,b;
    while(cin>>a>>b){
        a=log10(a+b)+1;
        cout<<a<<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<1171) break;
		
		//--------------
		c=a+b;
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

C++: #include <stdio.h>

using namespace std;

int main(){
	int a, b;

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

	return 0;
}