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266A.cpp

@@ -0,0 +1,27 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+int main()
+{
+   int n,i,count=0;
+   string s;
+   cin>>n;
+   for(i=0;i<n;i++)
+   {
+       cin>>s;
+       if(s[i]==s[i+1])
+       {
+           count++;
+       }
+   }
+   if(count==0)
+   {
+       cout<<"0"<<endl;
+   }
+   else
+   {
+       cout<<count<<endl;
+   }
+   return 0;
+}