#include <iostream> using namespace std; int main() { int n; cin >> n; int rev_n = 0; int abs_n = abs(n); while (abs_n!= 0) { rev_n = rev_n * 10 + abs_n % 10; abs_n /= 10; } if (n < 0) { rev_n = -rev_n; } cout << rev_n << endl; }