# triangle part 1
def triangle(n):
s = ''
for w in range(n+1):
for h in range(w):
s += '#'
if h == w -1:
s += '\n'
return s
# triangle part 2
def triangle(n):
s = ''
for i in range(1,n+1):
s += (n - i) * '#'
s += '\n'
return s
# triangle part 3.
def triangle(n):
s = ''
mid = n/2
for i in range(0,n+1):
row = (n - i)
s += (abs(abs(row - 5) - 5) * '#') + '\n'
return s