Created
June 21, 2012 05:45
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import sys | |
def hamming(p1,p2,p3): | |
yield 1 | |
for n in imerge( imult(p1, hamming(p1,p2,p3)), imerge( imult(p2, hamming(p1,p2,p3)), imult(p3, hamming(p1,p2,p3)) ) ): | |
yield n | |
def imult(a, xs): | |
x = xs.next() | |
while True: | |
yield a*x | |
x = xs.next() | |
def imerge(xs, ys): | |
x = xs.next() | |
y = ys.next() | |
while True: | |
if x == y: | |
yield x | |
x = xs.next() | |
y = ys.next() | |
elif x < y: | |
yield x | |
x = xs.next() | |
else: | |
yield y | |
y = ys.next() | |
def hamming_i(p1,p2,p3,i): | |
g = hamming(p1,p2,p3) | |
for j in range(i+1): | |
a = g.next() | |
return a | |
def main(): | |
if len(sys.argv) != 5: | |
print "hamming.py p1 p2 p3 i" | |
raise SystemExit | |
p1 = int(sys.argv[1]) | |
p2 = int(sys.argv[2]) | |
p3 = int(sys.argv[3]) | |
i = int(sys.argv[4]) | |
print hamming_i(p1,p2,p3,i) | |
if __name__ == '__main__': | |
main() |
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