输入一行数字，如果我们把这行数字中的‘5’都看成空格，那么就得到一行用空格分割的若干非负整数（可能有些整数以‘0’开头，这些头部的‘0’应该被忽略掉，除非这个整数就是由若干个‘0’组成的，这时这个整数就是0）。-Enter the line number, if we put the line numbers in the ' 5 ' is seen as a space, then get a line number separated by a space of non-negative integer (may be some integer to ' 0'　at the beginning, the head of the ' 0 ' should be ignored, unless the integer is the number ' 0'　composition, then the integer is 0.)