见

#include <bits/stdc++.h>
using namespace std;
int main(){
int a;
cin>>a;
if(a>=0&&a<=9)cout<<"1";
else if(a>=10&&a<=99)cout<<"2";
else if(a>=100&&a<=999)cout<<"3";
else if(a>=1000&&a<=9999)cout<<"4";
else if(a>=10000&&a<=99999)cout<<"5";
else if(a>=100000&&a<=999999)cout<<"6";
else if(a>=1000000&&a<=9999999)cout<<"7";
else if(a>=10000000&&a<=99999999)cout<<"8";
return 0;
}