RITA v2.0

Time Limit: 0.5 sec

 

The Problem

RITA can add and multiply numbers successfully with your program. Now Riyad wants it to Divide and subtract numbers. There will be two types of command:

1. SUB N1 from N2: this command will subtract N1 from N2.

2. DIV N1 by N2: this command will divide N1 by N2.

Help him to write the program.

 

The Input

There will be two types of input:

SUB N1 from N2

DIV N1 by N2

Here N1 and N2 are 64 bit integers. Input will terminate by EOF.

 

The Output

For each line of input print a line of output. If SUB command is found, just print the answer of (N2-N1).

If DIV command is found,

1. If N1/N2 is undefined then Print “Error!” without quote.

2. If N1 and N2 both are 0 then print “Error!!!”.

3. If N1 can be divided by N2, then print the answer with 2 values after decimal point.

 

Sample Input

SUB 20 from 10

DIV 20 by 0

SUB 10 from 20

DIV 0 by 0

DIV 20 by 10

DIV 5 by 2

 

Sample Output

-10

Error!

10

Error!!!

2.00

2.50

 

 

 

 

Online Practice Contest 3 [School & College Level]

Problem Setter: Fahim Abrar