#include <string> #include <iostream> using namespace std; int main() { string s; while(cin >> s){ int n = s.size(); int res = 0; for(int i = 2;i < n;i ++){ if(s[i] <= 'F' && s[i] >= 'A') res = res * 16 + s[i] - 'A' + 10; else res = res * 16 + s[i] - '0'; } cout << res << endl; } return 0; }