不重复打印三元组_python3
不重复打印排序数组中相加和为给定值的所有三元组
http://www.nowcoder.com/questionTerminal/11b7dd7cbf064900bc664bb5fd4e2fab
数据竟然不允许前两个数相同，要加上and l[i] != l[a]。。。
n, k = map(int, input().split())
l = list(map(int, input().split()))
for i in range(n - 2):
if i > 0 and l[i] == l[i-1]:
continue
x = k - l[i]
a = i + 1
b = n - 1
while a < b:
tmp = l[a] + l[b]
if tmp == x and l[i] != l[a]:
print(l[i], l[a], l[b])
a += 1
b -= 1
while l[a] == l[a-1] and a < b:
a += 1
while l[b] == l[b+1] and a < b:
b -= 1
elif tmp < x:
a += 1
else:
b -= 1 
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