CF670A.Holidays

On the planet Mars a year lasts exactly n days (there are no leap years on Mars). But Martians have the same weeks as earthlings — 5 work days and then 2 days off. Your task is to determine the minimum possible and the maximum possible number of days off per year on Mars.

在火星上，一年恰好有 $n$ 天（火星上没有闰年）。但火星人的星期与地球人相同——5 个工作日，随后是 2 天休息日。你的任务是确定火星上一年中休息日的最少天数和最多天数。

The first line of the input contains a positive integer n (1 ≤ n ≤ 1 000 000) — the number of days in a year on Mars.

输入的第一行包含一个正整数 $n$（$1 ≤ n ≤ 1 000 000$）—— 火星上一年的天数。

Print two integers — the minimum possible and the maximum possible number of days off per year on Mars.

输出两个整数——火星上每年可能的最少和最多休息天数。

In the first sample there are 14 days in a year on Mars, and therefore independently of the day a year starts with there will be exactly 4 days off .

In the second sample there are only 2 days in a year on Mars, and they can both be either work days or days off.

在第一个样例中，火星上一年有 14 天，因此无论一年从哪一天开始，都恰好有 4 天休息日。

在第二个样例中，火星上一年仅有 2 天，且这两天既可以都是工作日，也可以都是休息日。