2041_20T2_Q5

Posted on Edited on In Views: Word count in article: 17 Reading time ≈ 1 mins.

记录两个index之后交换他们的值

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#!/usr/bin/env python3

import sys
from collections import defaultdict

for line in sys.stdin:
    line = line.strip()
    if not line:
        continue
    
    line_list = line.split(" ")

    # key:value index:digit
    numbers=defaultdict(int)
    for index,word in enumerate(line_list):
        if word.isdigit():
            numbers[index] = word
    # 现在numbers里面就是index:digit的键值对了

    # 先判断找到了数字了吗
    if not numbers:
        print(line)
        continue

    # 然后交换最大的index和最小的index的值放回line
    max_index = max(numbers.keys())
    min_index = min(numbers.keys())

    line_list[max_index],line_list[min_index] = line_list[min_index],line_list[max_index]
    print(" ".join(line_list))