n = int(input())
s = input()

ans = n
for i in range(n-1):
  if s[i] == s[i+1]:
    ans += -1
print(ans) n = int(input()) n int(input()) int input() input s = input() s input() input ans = n ans n for i in range(n-1):
  if s[i] == s[i+1]:
    ans += -1 i range(n-1) range n-1 n 1 if s[i] == s[i+1]:
    ans += -1 s[i] == s[i+1] s[i] s i s[i+1] s i+1 i 1 ans += -1 ans -1 print(ans) print ans ans += -1 -1 ans n = int(input()) int(input()) n ans = n n ans s = input() input() s
n = int(input())
s = input()

ans = n
for i in range(n-1):
  if s[i] == s[i+1]:
    ans += -1
print(ans)