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#include <iostream>
#include <cmath>
using namespace std;
int ime(int x)
{
	int y = 0;
	while (x) {
		y = y * 10 + x % 10;
			x /= 10;
	}
	return y;
}

int main()
{
	int x;
	cin >> x;
	cout << ime(x);
}