Description

Given $n$ points in the plane, find the minimum distance among all pairs of points.

Input Format

The first line contains $n$, with $2 \le n \le 200000$.

Each of the next $n$ lines contains two integers $x$ and $y$, the $x$-coordinate and $y$-coordinate of a point, separated by a single space.

Output Format

Output a single real number on one line: the shortest distance, rounded to $4$ decimal places.

3
1 1
1 2
2 2

1.0000

Hint

The testdata guarantees $0 \le x, y \le 10^9$.

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