Help me in solving EMPTYSTR problem

help
,
1

My issue

give me hint for this problem

My code

#include <bits/stdc++.h>
using namespace std;

int main() {
	// your code goes here
	int t;
	cin>>t;
	while(t--)
	{
	    int n;
	    cin>>n;
	    char arr[n];
	    for(int i=0;i<n;i++)
	    {
	        cin>>arr[i];
	    }
	    
	    int count=1;
	    for(int i=0;i<n;i++)
	    {
	        if(arr[i]==arr[i+1])
	        {
	            count++;
	        }
	         
	    }
	    cout<<count<<endl;
	}

}

Problem Link: Empty the String Practice Coding Problem