Codeforces Round #163 (Div. 2) A. Stones on the Table

 

题目：http://www.codeforces.com/contest/266/my

思路：模拟法

#include <iostream>

using namespace std;
char arr[55];
int main()
{
     int n;
     cin>>n;
     for(int i=0;i<n;i++)
     {
        cin>>arr[i];
     }
     int ans=0;

     for(int i=0;i<n;i++)
     {
         if(arr[i]==arr[i+1]) ans++;
     }
     cout << ans;
     return 0;
}