Problem2872--Magnum Opus

2872: Magnum Opus

Time Limit: 2 Sec  Memory Limit: 256 MB
Submit: 0  Solved: 0
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Description

time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

Salve, mi amice.

Et tu quidem de lapis philosophorum. Barba non facit philosophum. Labor omnia vincit. Non potest creatio ex nihilo. Necesse est partibus.

Rp:

I Aqua Fortis

I Aqua Regia

II Amalgama

VII Minium

IV Vitriol

Misce in vitro et æstus, et nil admirari. Festina lente, et nulla tenaci invia est via.

Fac et spera,

Vale,

Nicolas Flamel

Input

The first line of input contains several space-separated integers ai (0≤ai≤100).

Output

Print a single integer.

Examples
Input
2 4 6 8 10
Output
1

Source/Category