Go: package main

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

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		i := scanner.Text()
		var total int
		inputNum := strings.Fields(i)
		for _, v := range inputNum {
			num, err := strconv.Atoi(v)
			if err != nil {
				break
			}
			total += num
		}
		fmt.Println(DigitCount(strconv.Itoa(total)))
	}
}

func DigitCount(str string) int {
	return len(str)
}

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

using namespace std;

#define all(c) (c).begin(), (c).end()
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};

int main() {
    int a, b;
    while (cin >> a >> b) {
        int s = a + b;
        int ans = log(1.0 * s) / log(10.0) + 1;
        cout << ans << endl;
    }

    return 0;
}

C++: #include <iostream>

int main(){
  int a, b, c;
  int i = 10;
  int num = 1;
  
  std::cin >> a;
  std::cin >> b;
  
  c = a + b;
  while(1){
    if(c/i!=0){
      num++;
      i *= 10;
    }else{
      break;
    }
  }
  std::cout << num << std::endl;
  
  return 0;
}

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

using namespace std;

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

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

int main(){
	while(1){
	int a,b;
	cin>>a>>b;
	int n=a+b;
	int ans=0;
	while(n>0){
		n/=10;
		ans++;
	}
	if(ans==0)ans++;
	cout<<ans<<endl;
	}
	return 0;
}

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

#define MAX 256

int f(int z){
	if (z < 10)return 1;
	return 1 + f(z / 10);
}

int main(void){
	
	int ans[200];
	for (long i = 0; i < 200; i++){
		ans[i] = 0;
	}

	long a, b;
	long i = 0;

	while (scanf("%ld%ld", &a, &b) != EOF){
		ans[i] = f(a + b);
		i++;
	}

	for (int j = 0; j < i; j++){
		printf("%d\n", ans[j]);
	}

	return 0;
}

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

C++: #include<iostream>
#include<algorithm>
#include<string>
using namespace std;
	int main(){
		int a,b;
		while(cin>>a>>b){
		int ans=a+b;int c=1;
		while(true){
			if(ans/10>=1){
				ans=ans/10;
				c++;
			}
			else if(ans/10==0)break;
		}
		//if(ans==0)cout<<0<<endl;
		 cout<<c<<endl;
		}
	return 0;
	}

C++: #include<stdio.h>
#include<vector>
#include<algorithm>
#include<cmath>

int main(){
    int i, j;
    int a,b,c;
    // std::vector<int> avec, bvec;
    for (i = 0; i <= 200; i++){
        scanf("%d %d", &a,&b);
        c = a + b;
        printf("%d\n",c);

        for(j = 0; j < 8; j++){
            if (c / std::pow(10,j) < 1){
                printf("%d\n",j);
                break;
            }
        }
        // avec.push_back(a);
        // bvec.push_back(a);
    }

    return 0;
}

C++: #include <vector>
#include <list>
#include <map>
#include <set>
#include <stack>
#include <queue>
#include <deque>
#include <algorithm>
#include <utility>
#include <functional>
#include <sstream>
#include <iostream>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <climits>
#include <cassert>
using namespace std;
inline int toInt(string s) {int v; istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<string> vs;
typedef pair<int, int> pii;
typedef long long ll;
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(),(a).rend()
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define EACH(t,i,c) for(t::iterator i=(c).begin(); i!=(c).end(); ++i)
const double EPS = 1e-10;
const double PI  = acos(-1.0);

int main(){
	while(!cin.eof()&&!cin.bad()&&!cin.fail()){
		int a=-1,b=-1;
		cin>>a>>b;
		if(!cin.eof()&&!cin.bad()&&!cin.fail()&&a>=0&&b>=0){
		cout<<toString(a+b).size()<<endl;
		}else{
			break;
		}
		
	}
}

C++: #include <iostream>

int main(){
  int a, b, c;
  int i = 1;
  int num = 0;
  
  std::cin >> a;
  std::cin >> b;
  
  c = a + b;
  while(1){
    if(c/i!=0){
      num++;
      i *= 10;
    }else{
      break;
    }
  }
  std::cout << num << std::endl;
  
  return 0;
}

C++: #include <stdio.h>

int main(){

	int a=0,b=0;

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

C++: #include<stdio.h>
main(){
  int a,b,s,i;
  while(scanf("%d %d",&a,&b) !=EOF){
    s=0;
    s=a+b;
    for(i=1;s>=10;i++){
      s/=10;
    }
    printf("%d\n",i);
  }
  return 0;
}

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

using namespace std;

void readData(vector<string>& input_data){
}

int perseString(string line) {
    stringstream ss;
    ss << line;

    int a, b;
    ss >> a >> b;

    return a + b;
}

int countDigit(int n){
    int cnt = 1;

    while(n /= 10)
        ++cnt;

    return cnt;
}

void mainRoutine(){
    vector<string> input_data;

    readData(input_data);

    for(int i = 0; i < input_data.size(); ++i){
        auto ret = perseString("100 200");
        cout << countDigit(ret) << endl;
    }
}

int main() {
    mainRoutine();

    return 0;
}

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

		int temp=a+b;
		int ans=1;
		while((temp/=10)>0)
		{
			ans++;
		}
	printf("%d\n",ans);
	}
}

C++: #include <iostream>
#include <string>   
using namespace std;
 
int main(){
int a[2],i = 0,b,c = 1;

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

}

C++: #include<bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
int main(){
  int a,b,ans=1,ten=10;
  cin>>a>>b;
  a+=b;
  while(a>=10){
    ans++;
    a/=10;
  }
  cout<<ans<<endl;
}

C++: #include<iostream>
using namespace std;
int a,b;
int main(){
	while(cin>>a>>b){
		int c=a+b;
		if(c/1000000>=1){
			cout<<7<<endl;
		}
		else if(c/100000>=1){
			cout<<6<<endl;
		}
		else if(c/10000>=1){
			cout<<5<<endl;
		}
		else if(c/1000>=1){
			cout<<4<<endl;
		}
		else if(c/100>=1){
			cout<<3<<endl;
		}
		else if(c/10>=1){
			cout<<2<<endl;
		}
		else{
			cout<<1<<endl;
		}
	}
	return 0;
}

C++: /*#include <iostream>

using namespace std;

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


}*/
#include <iostream>
using namespace std;

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