Description

• A fraction can be written as a/b where a and b are integers and a, b ≠ 0.

• Read the comments in p-14-3.cpp and fill all functions to finish this exercise.

Input

• Input: See the sample I/O

• Input format: See the sample I/O

Output

• Output: See the sample I/O

• Output format:

1. There is a space before and after each character (+,−,*,/,=), however,  the sign “-” doesn’t include in this character.

2. Change a new line at the end of each line.

Sample Input  Download

Sample Output  Download

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