蓝桥杯刷题--python-12

3768. 字符串删减 - AcWing题库

n=int(input())

s=input()

res=0

i=0

while(i<n):

if si=='x':

j=i+1

while(j<n and sj=='x'):

j+=1

res+=max(j-i-2,0)

i=j

else:

i+=1

print(res)

3777. 砖块 - AcWing题库

https://www.acwing.com/activity/content/code/content/5532758/

T=int(input())

def update(a,i):

if ai=='W':

ai='B'

else:

ai='W'

def check_(c):

res=\[\]

s_=s:

for i in range (n-1):

if s_i!=c:

update(s_,i)

update(s_,i+1)

res.append(i)

if s_-1!=c: return False

print(len(res))

for i in res:

print(i + 1, end=' ')

if len(res):

print()

return True

while(T):

n=int(input())

s=list(input())

if not check_('B') and not check_('W'):

print(-1)

T-=1