URI Online Judge | 2159
# Approximate Number of Primes

**Timelimit: 1**

By M.C. Pinto, UNILA Brazil

Schoenfeld and Rosser published a paper in 1962 describing a minimum and a maximum value to the quantity of prime numbers up to **n**, for **n** ≥ 17. This quantity is represented by the function **(n)** and the inequality is shown below.

Your task is, given a natural number **n**, to compute the interval's minimum and maximum values to the approximate number of primes up to **n**.

The input is a natural number **n** (17 ≤ **n** ≤ 10^{9}).

The output is given as two values **P** and **M** with 1 decimal place each, such that **P** < **(n)** < **M** according to the given inequality above. These two values have one blank space between them.

Input Samples | Output Samples |

17 |
6.0 7.5 |

50 |
12.8 16.0 |

100 |
21.7 27.3 |