Go: package main

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

var (
	sc = bufio.NewScanner(os.Stdin)
)

func main() {
	for sc.Scan() {
		chunks := strings.Split(sc.Text(), " ")
		a, _ := strconv.Atoi(chunks[0])
		b, _ := strconv.Atoi(chunks[1])
		fmt.Println(len(fmt.Sprint(a + b)))
	}
}

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

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef pair<int, int> ii;
typedef pair<ll, int> li;
typedef pair<int, ll> il;
typedef vector<ii> vii;
typedef vector<il> vil;
typedef vector<li> vli;

#define F first
#define S second
#define pb(x) push_back(x)
#define mp(a,b) make_pair(a,b)
#define sz size()
#define all(A)    A.begin(), A.end()
#define mem(a, b) memset(a, b, sizeof(a))
#define f0(i,b)   for(int i=0;i<(b);i++)
#define f1(i,b)   for(int i=1;i<=(b);i++)
#define f2(i,a,b) for(int i=(a);i<=(b);i++)
#define fr(i,b,a) for(int i=(b);i>=(a);i--)
#define rep(i,a,b,c) for(int i=(a);i!=(b);i+=(c))
#define mod 1000000007

#define forr(i,n)    for(i=0; i<n; i++)
#define whilee(i,t)  while(i!=t)
#define  sl(a)  scanf("%lld",&a)
#define  pl(a)  printf("%lld",a)

//for(auto it =A.begin(); it!=A.end(); it++)
//sort(A.begin(),A.end());
//binary_search(A.begin(),A.end(),x);
//reverse(A.begin(), A.end());
//cout << *max_element(A.begin(), A.end());
//cout << *min_element(A.begin(), A.end());
//count(A.begin(), A.end(), X); //counts the occurrences of X
//distance(A.begin(),A.end());  //distance between first to last element
//accumulate(A.begin(), A.end(), 0); //add
//next_permutation(A.begin(), A.end());
//prev_permutation(A.begin(), A.end());
//swap(S[0], T[0]);
//scanf("%d",&x);
//printf("%d\n",x);

//vector <int> A;
//deque <int> A;
//queue <int> A;
//stack <int> A;
//set <int> A;
//map <int,int> A;
//pair <int,int> A ;
//vector <pair <int,int>> A ;
//char ch;
string S, T, U;
ll i, j, k, a, b, c, d, f, g, h, l, m, n, p, q, r, s, t, w, x, y, z, maxx=INT_MIN, minn=INT_MAX, ans=0, sum=0, cnt=0;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    while(cin>>x>>y)
    {
        n=x+y;
        cnt=0;
        while(n>0)
        {
            cnt++;
            n/=10;
        }
        cout<<cnt<<endl;
    }

    return 0;
}

C++: #include<iostream>

using namespace std;

int main(void){
  int i=0,n=0,a[200],b=0;
  while(cin >> i >> n){
    a[b] = i+n;
    b++;
    i=0; n=0;
  } 
  for(i=0;i<=b;i++){
    while(a[i]!=0){
      a[i] = a[i]/10;
      n++;
    }
    cout << n <<endl;
    n = 0;
  }
}

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

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

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

int main(){
int a,b;
while(cin>>a>>b){
cout<<floor(log((double)a+b)-1)<<endl;
}

return 0;
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
#include <functional>

using namespace std;

int a, b;

int process(){
	int sum = a + b;
	int digit = 1;
	
	while (sum / 10 > 0){
		sum /= 10;
		digit++;
	}
	
	return digit;
}

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

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

int main() {
	int a, b;
	cin >> a >> b;
	int sum = a + b;
	int i = 1;
	int count = 0;
	while (sum/i!=0){
		count++;
		i *= 10;
	}
	cout << count;
	return 0;
}

C++: #include<stdio.h>

int main()
{
    int i,a,b,sum,j;
    while (scanf ("%d%d",&a,&b) != EOF)
    {
    j=0;
        sum=0;
        if(((a<0 || a>1000000)||(b<0 || b>1000000))||(i>200))
            break;
        sum=a+b;
        while(sum!=0)
        {
            sum=sum/10;
            j++;
        }
        printf("%d\n",j);
        i++;
    }
    return 0;
}

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

int main(){
	int a,b,c;
	int ans;
	
	string cunning="7767555555555555555555555555555555555555545555555555555555555555555555555555555555555555555555555555";
	
	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<string>
int main(){
    string a, b;
    while(cin >> a){
        cin >> b;
        printf("%d %d\n", a.length(), b.length());
    }
}

C++: #include<iostream>
using namespace std;
int main(){
	int x,y,z,pre;
	while(cin>>x>>y){
		z=x+y;
		pre=0;
		while(z>0){
			z/=10;
			pre++;
		}
		cout<<pre<<endl;
	}
	return 0;
}

C++: //#include<stdio.h>
#include<iostream>
using namespace std;
int main(){
	int ab[200][2],f,i=0,a,g,k=0;
	while(cin>>f){
		scanf("%d %d",&ab[i][1],&ab[i][2]);
		i++;
	}
	for(int j=0;j<i;j++){
		a=ab[j][1]+ab[j][2];
		for(g=0;;g++){
			if(a==0&&g==0){
				printf("%d\n",a);
				break;
			}
			a=a/10;
			k++;
			if(a==0){
				printf("%d\n",k);
				break;
			}
		}
		k=0;
	}
	return 0;
}

C++: #include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main() {
	string a, b;
		cin >> a >> b;
	cout << a.size() + b.size() << endl;
}

C++: #include <cstdio>
#include <cmath>
int main() {
	int a,b;
	while(scanf("%d %d",&a,&b)!=EOF) {
		if((a+b)==0) {
			printf("1\n");
		}else {
			printf("%d\n",(int)log10((double)(a+b))+1);
		}
	}
}

C++: #define scanf_s scanf
#include <stdio.h>
#include <iostream>
using namespace std;
#define MAX 200
int main(void)
{
	int a, b, sum, cou = 0;
	while (scanf_s("%d %d", &a, &b) != EOF) {
		sum = a + b;
		if (sum != 0){
		++cou;
			while (1) {
				if (sum <= 1) break;
				sum /= 10;
				++cou;
			}
		}
		printf("%d", cou);
		cou = 0;
	}
}

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

using namespace std;

void do_calc(int a, int b){
  int c = a + b;
  int n = 0;
  while(true){
    if(c < 1.0f){
      cout << n << endl;
      break;
    }
    c = c/10;
    n++;
  }
}
  


int main(){
  int a, b;
  while(cin >> a >> b){
    do_calc(a, b);
  }
}

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 <cmath>
using namespace std;

int main(int argc, const char * argv[])
{
    int a,b;
    while(cin >> a >> b){
        cout << (int)log10(a+b) + 1 << endl;
    }
    return 0;
}

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

int main() {
    std::string moji;
    int a, b;
    
    while (1) {
        std::cin >> a >> b;
        moji = std::to_string(a+b);
        if (std::cin.eof()) break;
        std::cout << moji.size() << std::endl;
    }
    
    return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
int digit(int s){return log(s)/log(10);}
int main(){
int a,b;while(cin>>a>>b){cout<<digit(a+b)<<endl;}
}

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

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++;
    }else{
      break;
    }
  }
  std::cout << num << std::endl;
  
  return 0;
}

C++: #include <iostream>

int main(){
	int cnt,a,b;
	while(std::cin>>a>>b){
		for(int i=10,cnt=0;;i*=10,cnt++){
			if((a+b)/i==0){
				std::cout<<cnt<<'\n';
				break;
			}
		}
	}
	return 0;
}

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

int main()
{
  int a, b;
  
  while (~scanf("%d%d", &a, &b)){
    stringstream conv;
    conv << a + b;
    cout << conv.str().size() << endl;
  }

  return (0);
}