Swayamvar Program In Python

 n= int(input())


groom= input()

brid=input()

c_r = brid.count('r')

c_m = brid.count('m')


lst = [i for i in groom]

for i in groom:

    if i == 'r':

        if c_r==0:

            print(len(lst), end='')

            break

        c_r-=1

        lst.pop(0)

    elif i == 'm':

        if c_m==0:

            print(len(lst),end='')

            break

        c_m-=1

        lst.pop(0)

else:

    print(0,end='')


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