Suma de número impar en Python
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
"""
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