def calculate_sum(n):
# Calculate the sum of numbers from 1 to n
total_sum = (n * (n + 1)) // 2
# Subtract all the 2nd values from the sum
if n % 2 == 0:
total_sum -= (n // 2) * (n // 2 + 1)
else:
total_sum -= ((n - 1) // 2) * ((n - 1) // 2 + 1)
return total_sum
try:
# Read the number of test cases
t = int(input())
# Process each test case
for _ in range(t):
n = int(input())
result = calculate_sum(n)
print(result)
except ValueError:
print("Invalid input. Please enter valid integers.")
except ZeroDivisionError:
print("Error: Division by zero occurred.")
except Exception as e:
print("An error occurred:", e)
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