N = int(input())

A = list(map(int, input().split())) + [0]

B = list(map(int, input().split())) + [0]

x = 0

ans = 0

for i in range(N + 1):
    
    if A[i] == B[i] and x == 1:
        
        ans += 1
        
        x = 0
        
    elif A[i] != B[i] and x == 0:
        
        ans += 1
        
        x = 1
        
        
print(ans // 2)