【例2.1】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.
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