#include <iostream> #include <vector> #include <algorithm> #include <functional> #include <cmath> #include <map> #include <queue> #include <string> #include <string.h> #define reps(i,s,n) for(int (i) = (s); (i) < (n); (i)++) #define rep(i,n) reps(i,0,n) using namespace std; using ll = long long; using pii = pair<int,int>; using vi = vector<int> ; using vl = vector<ll>; int main(){ int n; cin >> n; if(n <= 99 && n >= 10){ cout << "Yes" <<endl; }else{ cout << "No" << endl; } return 0; }