Go: package main

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

var scanner = bufio.NewScanner(os.Stdin)

func nextString() string {
	scanner.Scan()
	return scanner.Text()
}

func nextInt() (int, error) {
	return strconv.Atoi(nextString())

}

func main() {
	scanner.Split(bufio.ScanWords)

	for {
		a, err := nextInt()
		if err != nil {
			break
		}
		b, _ := nextInt()

		s := a + b
		nDigits := int(math.Log10(float64(s))) + 1
		fmt.Println(nDigits)
	}
}

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

int main(){
	int a, b;
	while(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;
	}
}

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

int main(){
	int a,b,c;
	int ans;
	
	string cunning="776755";
	
	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<stdio.h>
int main(){
	int ab[200][2],f;
	while(cin>>f){
		scanf("%d %d",&ab[i][1],&ab[i][2]);
	}
}

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

using namespace std;

void get_digit(int a,int b){
  int sum = a+b;
  int digit=0;

  if(sum != 0){
    digit++;
  }
  while(sum != 0){
    sum /= 10;
    digit++;
  }

  cout << digit << "\n";
}

int main(){
  int i=0;
  int input=-1;
  int a=-1,b=-1;

  while(cin >> input ){
    if(i == 0){
      get_digit(a,b);
      a = -1;
      b= -1;
    }
    i++;
    if(i == 1){
      a = input;
    }else if(i == 2){
      b = input;
      i=0;
    }
  }

  return 0;
}

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

#define ALL(a) (a).begin(), (a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i, c) for (typeof((c).begin()) i = (c).begin(); i != (c).end(); ++i)
#define EXIST(s, e) ((s).find(e) != (s).end())
#define SORTASC(c) sort((c).begin(), (c).end())
#define SORTDESC(c, t) sort((c).begin(), (c).end(), std::greater<t>());
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define REP(i, n) FOR(i, 0, n)
#define dump(x) cerr << #x << " = " << (x) << endl;
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" \
                      << " " << __FILE__ << endl;

const double PI = acos(-1.0);

using ll = long long;
using namespace std;

int main()
{
    ll a, b;
    vector<ll> h;

    while(cin >> a >> b){
        auto tmp = a + b;
        cout << to_string(tmp).length() << endl;
    }
    
    return 0;
}

C++: #include <cstdio>

using namespace std;

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

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

int number_of_digits(int n) {
	int result = 0;
	while (n != 0) {
		result++;
		n /= 10;
	}
	return result;
}

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

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

void digit()
{
    int i = 0;
    int digit[200] = {0};
    long int a, b, sum;
    while(i < 200)
    {
        cin >> a >> b;
        if((a>=0 && a <=1000000) && (b >=0 && b<=1000000))
        {
            sum = a+b;
            while(sum > 0)
            {
                sum = sum/10;
                digit[i] = digit[i]+1;
            }
            i++;
        }
        else
            exit(1);
    }
    for(int i = 0; i < 200; i++)
    {
        cout << digit[i] << endl;
    }



}


int main () {

digit();

return 0;

}

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

using namespace std;

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

C++: #include<iostream>
using namespace std;
int main(){
  int a,b,ans=0,ans1,ans2;
  while(1){
    ans1=0;
    ans2=0;
    cin>>a>>b;
    ans++;
    if(ans>=200){
      break;
    }
    ans1=a+b;
    while(1){
      if(ans1>=10){
	ans2++;
	ans1=ans1/10;
      }
      if(ans1<10){
	cout<<ans2+1<<endl;
	break;
      }
    }
  }
  return(0);
}

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

int main(){
  int a, b;

  while(cin >> a >> b){
    stringstream ss;
    ss << a + b;
    cout << ss.str().size() << endl;
  }
}

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

int main()
{
    int IsB = 0,i = 0;
    char a[100],b[100],*digits;
    while(1){
        char str = '\0';
        scanf("%c",&str);
        if(str == '\0')break;
        if(str == ' '){
            i = 0;
            IsB = 1;
        }else if(str == '\n'){
            sprintf(digits,"%d",atoi(a) + atoi(b));
            printf("%d\n",strlen(digits));
            i = 0;
            IsB = 0;
        }else if(IsB == 0){
            a[i++] = str;
        }else{
            b[i++] = str;
        }
    }
}

C++: #include<iostream>
using namespace std;
class DigitNumber{ 
    public:
        void solve(int a,int b){
            string sum=to_string(a+b);
            if(sum=="0")cout<<0<<endl;
            else cout<<sum.length()<<endl;
        }
};
int main(){
    DigitNumber inst;
    int a,b;
    while(true){ 
        cin>>a>>b;
        inst.solve(a,b);
    }
}

C++: #include <stdio.h>

int main(void)
{
	int a,b;
	int i;
	int count_1=0;
	int count_2 = 0;
	scanf("%d %d",&a,&b);
	
	while(a / 10 >= 1)
	{
		a = a/10;
		count_1++;
	}
	while(b / 10 >= 1)
	{
		b = b/10;
		count_2++;
	}
	printf("%d\n",count_1+count_2+2);
}

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

using namespace std;
int main()
{
    long long a,b;
    while(scanf("%lld %lld",&a,&b)!=EOF)
    {
        cout << floor(log10(a+b))+1 << endl;
    }
    return 0;
}

C++: #include <iostream>

int Count(int value)
{
    int count = 1;
    while (value >= 10) {
        value /= 10;
        count++;
    }
    return count;
}

int main()
{
    int a, b;
    while (std::cin >> a >> b) {
        std::cout << Count(a + b) << std::endl;
    }

    return 0;
}

C++: #include <iostream>
#include <string>
#include <algorithm>
#include <utility>
#include <stack>
#include <queue>
#include <vector>
#include <cmath>

#define pb push_back

using namespace std;

typedef long long ll;

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

        return 0;
}

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

using namespace std;

int main(){
   int a,b,x,i;
   
   while(cin>>a>>b){
      i = 0;
      x = a+b;
      
      for(;;){
         if(x <= 0)
            break;
         
         x = x/10;
         i++;
      }
      printf("%d\n",i);
   }
   return 0;
}

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

int main(){
	int a,b;
	for( int i=0;i<200;i++ ){
		cin>>a>>b;
		if( a<0||b<0||1000000<a||1000000<b)
			break;
		cout<<(int(log10(a+b))+1)<<endl;
	}
	return 0;
}