#include <iostream>
using namespace std;

int main() {
    int a;
    cin >> a;
    int s = 0;
    int current_num = 0;
    for (int i = 1; i <= 5; i++) {
        current_num = current_num * 10 + a;
        s += current_num;
    }
    cout << s << endl;
    return 0;
}
/**************************************************************
	Problem: 1245
	User: panyuchen
	Language: C++
	Result: Wrong Answer
****************************************************************/