evaluate 100 ^ 2 - 99 ^ 2 + 98 ^ 2 - 97 ^ 2 + 96 ^ 2 - 95 ^ 2 + . . . + 2 ^ 2 - 1 ^ 2 = ?
n0 = 100.0
n1 = 2.0
n2 = 99.0
n3 = 2.0
n4 = 98.0
n5 = 2.0
n6 = 97.0
n7 = 2.0
n8 = 96.0
n9 = 2.0
n10 = 95.0
n11 = 2.0
n12 = 2.0
n13 = 2.0
n14 = 1.0
n15 = 2.0
t0 = n0 + 1.0
t1 = n0 * t0
answer = t1 / 2.0
print(answer)