Dividing X by Y

Source: beecrowd

Version: Phuoc Hung OJ Extended

Problem Statement

Given two integers $X$ and $Y$, print divisao impossivel if $Y=0$. Otherwise print the real quotient $X/Y$ with exactly one digit after the decimal point. This PHOJ version processes one pair per run instead of the original batch.

Input

Two integers $X$ and $Y$ on one line.

Output

Print one line: divisao impossivel when $Y=0$, or the real quotient with exactly one digit after the decimal point.

Subtasks

• Subtask 1 (20 points): $-10\le X,Y\le10$ and $Y\ne0$.
• Subtask 2 (30 points): $-1000\le X,Y\le1000$ and $Y\ne0$.
• Subtask 3 (50 points): $-10^6\le X,Y\le10^6$.

Examples

Input

5 2

Output

2.5

Explanation

$Y=2$ is nonzero. The real quotient is $5/2=2.5$, printed with one decimal digit.