#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() using namespace std; int main(){ int n,rev_n=0; int g; cin>>n; while(n!=0){ g=n%10; rev_n=rev_n*10+g; n=n/10; } cout<<rev_n<<endl; return 0; }