#include"bits/stdc++.h"
//#include"atcoder/all"
using namespace std;
//using namespace atcoder;
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
using ll = long long;
using ld = long double;
#define rep(i,m,n) for(ll i=(ll)m;i<(ll)n;i++)
#define drep(i,m,n) for(ll i=m-1;i>=n;i--)
#define Endl endl
#define pr(i,j) make_pair(i,j) 
#define isin(x,l,r) (l<=x&&x<r)
#define chmin(a,b) a=min(a,b)
#define chmax(a,b) a=max(a,b)
#define srt(ar) sort(ar.begin(),ar.end())
#define rev(ar) reverse(ar.begin(),ar.end())
const ll inf = 1e18;
const ld pi = 3.14159265358979;
//using mint = modint998244353;
int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	string n;
	cin >> n;
	set<string>s;
	rep(i, 0, n.length()) {
		rep(j, 0, 10) {
			string u = n.substr(0, i + 1) + to_string(j) + n.substr(i+1);
			s.insert(u);
		}
	}
	rep(i, 1, 10) {
		s.insert(to_string(i) + n);
	}
	cout << s.size() << endl;
}