#include
#include
#include
using namespace std;
map<char,int> m;
int string_to_int(string str,map<char,int>& m){
int len = str.length();
if(len == 0)
return 0;
else if(len == 1){
return m[str[0]];
}
char k = str[0];
return m[k] * (10 * (len-1)) + string_to_int(str.substr(1,(len-1)),m);
}
int main(){
m['0'] = 0;
m['1'] = 1;
m['2'] = 2;
m['3'] = 3;
m['4'] = 4;
m['5'] = 5;
m['6'] = 6;
m['7'] = 7;
m['8'] = 8;
m['9'] = 9;
string str;
cin>>str;
cout<<string_to_int(str,m);
cout<<endl;
return 0;
}
