题目描述:
主管期望你来实现英文输入法单词联想功能。需求如下:
依据用户输入的单词前缀,从已输入的英文语句中联想出用户想输入的单词,按字典序输出联想到的单词序列,如果联想不到,请输出用户输入的单词前缀。
注意:
1. ?英文单词联想时,区分大小写
2. ?缩略形式如”don't”,判定为两个单词,”don”和”t”
3. ?输出的单词序列,不能有重复单词,且只能是英文单词,不能有标点符号
输入描述:
输入为两行。
首行输入一段由英文单词word和标点符号组成的语句str;
接下来一行为一个英文单词前缀pre。
0 < word.length() <= 20
0 < str.length <= 10000
0 < pre <= 20
输出描述:
输出符合要求的单词序列或单词前缀,存在多个时,单词之间以单个空格分割
示例1
输入:
I love you
He
输出:He
说明:从用户已输入英文语句”I love you”中提炼出“I”、“love”、“you”三个单词,接下来用户输入“He”,从已输入信息中无法联想到任何符合要求的单词,因此输出用户输入的单词前缀。
示例2
输入:
The furthest distance in the world, Is not between life and death, But when I stand in front of you, Yet you don't know that I love you.
f
输出:front furthest
说明:从用户已输入英文语句”The furthestdistance in the world, Is not between life and death, But when I stand in frontof you, Yet you dont know that I love you.”中提炼出的单词,符合“f”作为前缀的,有“furthest”和“front”,按字典序排序并在单词间添加空格后输出,结果为“frontfurthest”。
?
解题思路:考察对数组、字符串、 排序、 循环的理解。
def remove(str):
return str.replace(".", "")
def compute(str, pre):
set = set()
arr = str.split(", ")
for i in range(len(arr)):
temp = arr[i]
arr2 = temp.split(" ")
if len(arr2) == 1:
set.add(remove(arr2[0]))
else:
for j in range(len(arr2)):
temp2 = arr2[j]
arr3 = temp2.split("'")
if len(arr3) == 1:
set.add(remove(arr3[0]))
else:
for s in arr3:
set.add(remove(s))
res = set()
for s in set:
if s.startswith(pre):
res.add(s)
if len(res) == 0:
print(pre)
else:
sb = ""
for s in res:
sb += " " + s
print(sb[1:])
def main():
n = 2
str = None
pre = None
while True:
if n == 2:
str = input()
if n == 1:
pre = input()
n -= 1
if n == 0:
break
compute(str, pre)
if __name__ == "__main__":
main()
?