【例2.1】Hello World
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说明
输出著名短句"hello world
"。
输入格式
无
输出格式
输出"hello world
"。
样例
无
hello world
You cannot submit for this problem because the contest is ended. You can click "Open in Problem Set" to view this problem in normal mode.
输出著名短句"hello world
"。
无
输出"hello world
"。
无
hello world
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