#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() #include <iostream> using namespace std; int main() { int n, a = 0, r; cin >> n; while(n != 0) { r = n % 10; a = a * 10 + r; n /= 10; } cout<< a << endl; return 0; }