fabs py
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import math
t = int(input())
for i in range(t):
x, y, c = map(float, input().split())
left = 0
right = min(x, y)
d = (left + right) / 2
while True:
a = math.sqrt(x * x - d * d)
b = math.sqrt(y * y - d * d)
c1 = 1 / ( 1 /a + 1 / b)
if c1 < c:
right = (left + right) / 2
else:
left = (left + right) / 2
d = (left + right) / 2
if not math.fabs(c1 - c) > 0.00001:
break
#print("{:.3f}".format(d))
print('%.3f' % d)
Python
INFO