N = int(input())
col = input()
count =0
for i in range(0,len(col)-1):
if col[i] == col[i+1]:
count+=1
else:
continue
print(count)
#include <iostream>
#include <string>
using namespace std;
int main(){
int n,c=0;
string str;
cin>>n>>str;
for(int i=0;i<n-1;i++){
if(str[i]==str[i+1]){
c++;
}
}
cout<<c;
return 0;
}
478A - Initial Bet | 981A - Antipalindrome |
365A - Good Number | 1204B - Mislove Has Lost an Array |
1409D - Decrease the Sum of Digits | 1476E - Pattern Matching |
1107A - Digits Sequence Dividing | 1348A - Phoenix and Balance |
1343B - Balanced Array | 1186A - Vus the Cossack and a Contest |
1494A - ABC String | 1606A - AB Balance |
1658C - Shinju and the Lost Permutation | 1547C - Pair Programming |
550A - Two Substrings | 797B - Odd sum |
1093A - Dice Rolling | 1360B - Honest Coach |
1399C - Boats Competition | 1609C - Complex Market Analysis |
1657E - Star MST | 1143B - Nirvana |
1285A - Mezo Playing Zoma | 919B - Perfect Number |
894A - QAQ | 1551A - Polycarp and Coins |
313A - Ilya and Bank Account | 1469A - Regular Bracket Sequence |
919C - Seat Arrangements | 1634A - Reverse and Concatenate |