#include #include #include #include #include #include #include #include #include using namespace std; typedef long long int llint; #define mp make_pair #define mt make_tuple #define pub push_back #define puf push_front #define pob pop_back #define pof pop_front #define fir first #define sec second #define res resize #define ins insert #define era erase const llint mod=1000000007; const llint moda=1000000000; const llint big=1e9+1e8; const llint red=0xE869120; const llint pro=1002001; int main(void){ string str; llint ans=0,ansa=0,i,j,n,gen,geng; cin>>str;n=str.size();str[0]--; gen=9;geng=9; for(i=1;istr[n-i-1]){ans--;ansa--;break;} if(str[i]