#include <iostream> using namespace std; int main() { long long n; cin >> n; long long reversed = 0; bool is_negative = false; if (n < 0) { is_negative = true; n = -n; } while (n > 0) { reversed = reversed * 10 + n % 10; n = n / 10; } if (is_negative) { reversed = -reversed; } cout << reversed << endl; return 0; }