HackerRank 楼梯 Python
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/31222291/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
HackerRank Staircase Python
提问by dericcain
I am trying to solve a problem in HackerRank and I am having an issue with my submission. My code works in PyCharm but HackerRank is not accepting my submission.
我正在尝试解决 HackerRank 中的问题，但我的提交有问题。我的代码在 PyCharm 中有效，但 HackerRank 不接受我的提交。
Here is the problem I am trying to solve: https://www.hackerrank.com/challenges/staircase
这是我试图解决的问题：https: //www.hackerrank.com/challenges/staircase
Here is my code:
这是我的代码：
def staircase(num_stairs):
n = num_stairs - 1
for stairs in range(num_stairs):
print ' ' * n, '#' * stairs
n -= 1
print '#' * num_stairs
staircase(12)
Any ideas why HackerRank is not accpeting my answer?
任何想法为什么 HackerRank 不接受我的答案？
采纳答案by Martijn Pieters
Your output is incorrect; you print an empty line before the stairs that should not be there. Your range()loop starts at 0, so you print nspaces and zero #characters on the first line.
您的输出不正确；你在楼梯前打印了一个不应该在那里的空行。您的range()循环从 开始0，因此您在第一行打印n空格和零#字符。
Start your range()at 1, and nshould start at num_stairs - 2(as Multiple arguments to print()adds a space:
从range()1开始，n应该从num_stairs - 2(作为多个参数print()添加一个空格：
from __future__ import print_function
def staircase(num_stairs):
n = num_stairs - 2
for stairs in range(1, num_stairs):
print(' ' * n, '#' * stairs)
n -= 1
print('#' * num_stairs)
You can simplify this to one loop:
您可以将其简化为一个循环：
def staircase(num_stairs):
for stairs in range(1, num_stairs + 1):
print(' ' * (num_stairs - stairs) + '#' * stairs)
Note that I use concatenation now to combine spaces and #characters, so that in the last iteration of the loop zero spaces are printed and num_stairs#characters.
请注意，我现在使用连接来组合空格和#字符，以便在循环的最后一次迭代中打印零空格和num_stairs#字符。
Last but not least, you could use the str.rjust()method(short for “right-justify”) to supply the spaces:
最后但并非最不重要的是，您可以使用该str.rjust()方法（“右对齐”的缩写）来提供空格：
def staircase(num_stairs):
for stairs in range(1, num_stairs + 1):
print(('#' * stairs).rjust(num_stairs))
回答by Pankaj Kumar
Another solution
另一种解决方案
n = int(raw_input())
s = '#'
for i in xrange( 1 , n+1):
print " "*(n-i) + s*i
回答by IzakMarshall
Another Answer
另一个答案
H = int(input())
for i in range(1,H+1):
H = H - 1
print(' '*(H) + ('#'*(i)))
回答by Sayak Sen
you can simply use while loop also.
您也可以简单地使用 while 循环。
import sys
n1=int(raw_input())-1
n2=1
while n1>=0:
print " "*n1,"#"*n2
n1=n1-1
n2=n2+1
回答by Siva Reddy Panga
def staircase(n):
for in range(i,n+1):
print str("#"*i).rjust(n)
回答by Kamil Sindi
回答by Amir Abdollahi
first, create a list, then print with join \n'
首先，创建一个列表，然后使用 join 打印 \n'
def staircase(n):
print("\n".join([' ' * (n-x) + '#' * x for x in range(1, n+1)]))
回答by Mahesh Bhattarai
for i in range(n):
result = ' '*(n-i-1) +('#')*(i+1)
print(result)
回答by Santosh Tirunagari
def staircase(n):
for i in range(0, n): # n rows
print(' '*(n-i-1) + '#'*(i+1)) # first print n-i-1 spaces followed by i '#'
n = int(input())
staircase(n)
