Module: (C++) 嵌套循环


Problem

3 /8


梯子

Problem

<分区>

给定一个自然数 n<=9。从n步输出阶梯，第i步由从1到i的数字组成，没有空格。< /p>

<分区>
输入
输入一个自然数。
 
印记 
打印问题的答案。
 
例子
<头> <日># <正文>

time 1000 ms
memory 256 Mb
Rules for program design and list of errors in automatic problem checking

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输入 输出
1 3 1
12
123