#include 
#include 
#include 
using namespace std;
typedef long long ll;


int main() {
    string s;
    cin >> s;
    
    int string_to_int = 0;
    for(int i = 0; i < (int) s.size(); i++) {
        string_to_int = string_to_int * 10 +  (s[i] - '0');
    }
    cout << string_to_int << endl;
    
    
    
    return 0;
}