A_Stones_on_the_Table.cpp

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a, count = 0;
    cin >> a;
    string s;
    cin >> s;
    for (int i = 0; i < s.length(); i++)
    {
        if (s[i] == s[i + 1])
        {
            count++;
        }
    }
    cout << count;

    return 0;
}