#include <iostream>
#include <cmath>
#include <cstdio>
using namespace std;
int main() {
//freopen("input.txt","r", stdin );
//freopen ("output.txt", "w",stdout);
// your code goes here
int a,m;
cin>>a;
int c1 = a/100;
int c2 = (a%100)/10;
int c3 = (a%100)%10;
int c4 = a%10;
m = (1000*c4)+(100*c3)+(10*c2)+c1;
cout<<m;
return 0;
}
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