Go: package main

import (
	"fmt"
	"strconv"
)

func main() {
	result := make([]int, 0, 200)

	for {
		var a, b int
		scanCount, _ := fmt.Scanf("%d %d", &a, &b)
		if scanCount == 2 {
			result = append(result, a+b)
		} else {
			break
		}
	}

	for _, v := range result {
		length := len(strconv.Itoa(v))

		fmt.Println(length)
	}
}

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

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

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

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

C++: #include <iostream>

int main(int argc, char const *argv[])
{
	
	while(!std::cin.eof()){
		int a,b;
		std::cin >> a >> b;
		int p = 10;
		int i = 1;
		while((a+b)/p != 0){
			i ++;
			p *= 10;
		}
		std::cout << i << std::endl;
	}
	return 0;
}

C++: #include<stdio.h>
#include <stdlib.h>
#include<iostream>
#include<cstring> // ??????????????????????±???????????????????
using namespace std;

int main(){
	int a,b,s=0,l;
	while( cin >> a >> b  ){
		char str[100];
		s=a+b;
		itoa(s,str,10); // s???10?????°??§??????????????????
		l = strlen(str); // ???????????????????????????
		cout << l << "\n";
	}
	return 0;
}

C++: #include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main()
{
    int a,b;
    char s[100];
    while(scanf("%d%d",&a,&b)!=EOF)
    {
        sprintf(s,"%d",a+b);
        printf("%d\n",strlen(s));
    }
    return 0;
}

C++: //
// Created by tac on 2016/10/27.
//

#include <cstdlib>
#include <iostream>
#include <cmath>

namespace {
int digit(int n) {
    return static_cast<int>(std::floor(std::log10(n)) + 1);
}
}

int main() {
    int a, b;
    while (true) {
        if (std::cin.eof()) {
            break;
        }
        std::cin >> a >> b;
        std::cout << digit(a + b) << std::endl;
    }
    return EXIT_SUCCESS;
}

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<1200) break;
		
		//--------------
		c=a+b;
		ans=1;
		while(10<=c){
			c/=10;
			ans++;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

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

using namespace std;

int main(){
	int a,b;
while(cin>>a>>b){
	}
	int n=a+b;
	if (n>99999){	
	cout<<6<<endl;
}
	else if(n>9999){
		cout<<5<<endl;
	}
		else if(n>999){
		cout<<4<<endl;
	}
		else if(n>99){
		cout<<3<<endl;
		}
		else if(n>9){
		cout<<2<<endl;
	}
	else{ 
	cout<<1<<endl;
	}
	}

C++: #include <iostream>
using namespace std;
int ans[10];

int main() {
	int a,b;
	while(cin >> a >> b){
		if(cin.eof())break;
	int sum = a+b;
	int j=1;
	int i=1;

	while(i){
		if(sum/=10){
			j++;
		}else{
			cout << j << "\n";
			break;
		}
	}
	}
	return 0;
}

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

int main(){
	int a,b,c;
	int ans;
	
	string cunning="77677";
	
	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 <cmath>
#include <algorithm>
#include <string>
using namespace std;
int main() {
    int a,b;
    while(cin >>a>>b){
        int c=0,d=a+b;
        while(d){
            d=d/10;
            c++;
        }
        cout <<c << endl;
    }
    return 0;
}

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

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

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

using namespace std;

int main() {
  int a, b;
  while (scanf("%d%d", &a, &b) == 2)
    printf("%d\n", int(log10(a + b)) + 1);
  return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
using uint = unsigned int;
using lint = long long int;
using ulint = unsigned long long int;
template<class T = int> using V = vector<T>;
template<class T = int> using VV = V< V<T> >;
template<class T, class U> void assign(V<T>& v, int n, const U& a) { v.assign(n, a); }
template<class T, class... Args> void assign(V<T>& v, int n, const Args&... args) { v.resize(n); for (auto&& e : v) assign(e, args...); }


V<string> split(const string& s, char c) {
  V<string> res;
  stringstream ss(s);
  string t;
  while (getline(ss, t, c)) res.push_back(t);
  return res;
}

int main() {
  cin.tie(nullptr); ios_base::sync_with_stdio(false);
  string str;
  while (getline(cin, str)) {
    auto ss = split(str, ' ');
    int a = stoi(ss[0]), b = stoi(ss[1]);
    string s = to_string(a + b);
    cout << s.size() << '\n';
  }
}

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

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

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

using namespace std;


int main(){
	int a,b;
	while (cin >>  a >>  b){
		int l = a+b;
		char n[50];
		itoa(l,n,10);
		cout << strlen(n) << endl;
	
	}
	return 0;
	}

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

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

 int digit(int a)
 {
  int count=0;
  while (a)
  {
    a/=10 ;
    count++;
  }
  return count;
}

int main(){
  int x, y;
  while( cin >> x >> y && x != EOF)
        cout << digit(x+y) << endl;
}

C++: #include<iostream>
using namespace std;
int keta(int a,int b)
{
	return (a+b)/10-(a+b)%10;
}
int main()
{
	int a[200],b[200];
	for(int i = 0;i<200;i++){
		a[i]=0;
		b[i]=0;
	}
	int i=0;
	while(cin>>a[i]>>b[i]){
		i++;
	}
	int j = 0;
	while(0){
		cout<<keta(a[j],b[j])<<"\n";
		if((a[j]&&b[j])==0){
			break;
		}
}
	return 0;
}

C++: #include <iostream>

using namespace std;

int main() {
    int a, b, c, i;

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

    return 0;
}

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

using namespace std;

int count_digit(int x) {
  int cnt = 1;
  while (x >= 10) {
    cnt++;
    x /= 10;
  }
  return cnt;
}

int main() {
  int a, b;
  while (scanf("%d %d", &a, &b) == 2) {
    printf("%d\n", count_digit(a+b));
  }
  return 0;
}