#include<stdlib.h> #include<stdio.h> #include<algorithm> #include<iostream> #include<stack> #include<map> #include<set> #include<string> #include<string.h> #include<math.h> #include<vector> using namespace std; typedef long long LL; const int MAXN=1e5+10; int charToint(char c){ if(c>='A')return c-'A'+10; else return c-'0'; } int main(){ string s; while(cin>>s){ s.erase(0,2); int number=0; for(int i=0;i<s.size();i++){ number*=16; number+=charToint(s[i]); } cout<<number<<endl; } return 0; }