#include <ctime>
#include <cstdio>
#include <algorithm>
#include <iostream>

using namespace std;

const int N = 1e7 + 1;
char s[N], t[N];
int main() {
  gets(s);
  gets(t);
  printf("%.2f\n", 1. * clock() / CLOCKS_PER_SEC);
}