- プログラミングのお題スレ Part4
449 ：デフォルトの名無しさん[sage]：2014/07/09(水) 00:30:05.43 ID:xRBjxmPo - >>439 Python
def f(x,n=0):
if isinstance(x, int):
d = x
ss = bin(abs(d))[2:]
if d < 0:
ss = bin((abs(d) ^ (2**len(ss)-1)) + 1)[-len(ss):]
else:
ss = "0" + ss
if len(ss) < n:
ss = ss[0] * (n-len(ss)) + ss
x = map(int, ss)
if n:
print "f({},{}) -> {}".format(d,n,x)
else:
print "f({}) -> {}".format(d,x)
else:
ss = "".join(map(str, x))
d = int(ss,2)
if x[0] == 1:
d = -((d ^ (2**len(x)-1)) + 1)
print "f({}) -> {}".format(x,d)
---
f(-1) -> [1]
f(-1,2) -> [1, 1]
|
|