#include <iostream> using namespace std; int main(){ int n, u; cin >> n; while(n){ u *= 10; u += n % 10; n /= 10; } cout << u; }

N = int(input()) a = N < 0 if a: N = -N b = str(N):-1 b = b.lstrip('0') if not b: c = 0 else: c = int(b) if a: c = -c print(c)

#include <iostream> using namespace std; int main(){ int n; cin>>n; int a=0; while(n!=0){ a=a*10+n%10; n/=10; } cout<<a; return 0; }