Question

I am new at Python. Here is my code which scans number of test cases tc as input and then two integers r and c and calculating my result.

Question: How to remove the error?

#!bin/bash/python
tc=int(input());
while tc:
    r,c=raw_input().split()
    if r%2==0:
        r=r/2
    else:
        r=r/2+1
    print(r*c)
    tc=tc-1

4       //input tc
10 10   //input r=10 c=10

Error displayed at the screen:

Traceback (most recent call last):
File "spoj_solders.py", line 5, in <module>
  if r%2==0:
TypeError: not all arguments converted during string formatting

What is this string formatting?

Platform: Ubuntu 10.04

Answer 1

The line r,c=raw_input().split() takes text from the user (raw_input()), returns it as a str type and splits that into two strings (separated by a space) and stores those in the variables r and c. So, r is a str, you can’t say if r%2==0: without casting r to an int like this:

r,c=raw_input().split()
if int(r)%2==0:
    r=int(r)/2
else:
    r=int(r)/2+1
print(r*c)
tc=tc-1