#38Easy

Calculator

Time: 1 s · Memory: 256 MB

Conditionals

Statement

You are given two integers with an operator between them: +, -, * or /. Perform the operation.

Addition, subtraction and multiplication give an integer. Division gives a real number: print it with exactly 2 digits after the decimal point (for example, 3.50 for 7 / 2).

Input format

A single line, separated by spaces: an integer $a$ , the operator, an integer $b$ ( $|a|, |b| \le 10^9$ ; $b \ne 0$ for division).

Output format

A single number — the result.

Examples

Input

6 * 8

Output

Input

7 / 2

Output

3.50

Note

Read the operator as a string or a character (char): C++ — cin >> a >> op >> b, Python — a, op, b = input().split().

$10^9 \cdot 10^9 = 10^{18}$ — you need long long in C++ and int64 in Go.

Calculator

Time: 1 s · Memory: 256 MB

Conditionals

Statement

You are given two integers with an operator between them: +, -, * or /. Perform the operation.

Addition, subtraction and multiplication give an integer. Division gives a real number: print it with exactly 2 digits after the decimal point (for example, 3.50 for 7 / 2).

Input format

A single line, separated by spaces: an integer $a$ , the operator, an integer $b$ ( $|a|, |b| \le 10^9$ ; $b \ne 0$ for division).

Output format

A single number — the result.

Examples

Input

6 * 8

Output

Input

7 / 2

Output

3.50

Note

Read the operator as a string or a character (char): C++ — cin >> a >> op >> b, Python — a, op, b = input().split().

$10^9 \cdot 10^9 = 10^{18}$ — you need long long in C++ and int64 in Go.