#include<bits/stdc++.h> using namespace std; int ans = 0; int sym; int main() { int n; cin>>n; if(n < 0){ sym = -1; n=-n; } else{ sym = 1; } while(n != 0){ ans = ans * 10 + n % 10; n = n / 10; } cout << sym * ans; return 0; }