#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000001

int main(){
	
	string s;
	cin>>s;
	set<string> S;
	rep(i,s.size()+1){
		rep(j,10){
			if(j==0&&i==0)continue;
		string t = s;
		t.insert(t.begin()+i,'0'+j);
		S.insert(t);
		}
		
	}
	cout<<S.size()<<endl;
		
	return 0;
}