【例69.1】 过滤多余的空格
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说明
一个句子中也许有多个连续空格，过滤掉多余的空格，只留下一个空格。
输入格式
一行，一个字符串（长度不超过 ），句子的头和尾都没有空格。
输出格式
过滤之后的句子。
样例
Hello world.This is c language.Hello world.This is c language.2026-4-26递推练习
- Status
- Done
- Rule
- XCPC
- Problem
- 9
- Start at
- 2026-4-26 13:30
- End at
- 2026-4-26 16:30
- Duration
- 3 hour(s)
- Host
-
admin
- Partic.
- 8