>>> myList = [1, 3, 5, 6, 8, 10, 34, 2, 0, 3]
>>> result = 0
>>> for item in myList:
... if not item%2:
... result += item
...
>>> result
60
>>> myList = [1, 3, 5, 6, 8, 10, 34, 2, 0, 3]
>>> result = 0 # Initialize your results variable.
>>> for i in myList: # Loop through each element of the list.
... if not i % 2: # Test for even numbers.
... result += i
...
>>> print(result)
60
>>>
def sum_evens(numbers):
total = 0
for x in numbers:
if x % 2 == 0:
total += x
return total
>>> lst = [0, 1, 2, 3, 4, 5]>>> sum(n for n in lst if n % 2 != 0)9
for tc in range(int(input())):
a,b = map(int,input().split())
x = b//2 + (b%2)
y = a//2
print("Case %d: %d"%(tc+1,x*x-y*y))
"""
Input:
2
1 10
2 10
Output:
Case 1: 25
Case 2: 24
"""