s = 13
x = 17
def f(x):
return (x + s/x)/2
tol = 999
while True:
tap = f(x)
if abs(tap - x) < tol:
break
x = tap
print(x)
cyA9IDEzCnggPSAxNwoKZGVmIGYoeCk6CglyZXR1cm4gKHggKyBzL3gpLzIKCSAKdG9sID0gOTk5CgkgCndoaWxlIFRydWU6Cgl0YXAgPSBmKHgpCglpZiBhYnModGFwIC0geCkgPCB0b2w6CgkJYnJlYWsKCXggPSB0YXAKCnByaW50KHgp