balanced paranthesis

// Online C++ compiler to run C++ program online
#include <iostream>

using namespace std;
int solve(int n,int os,int cs,char arr[],int c);
int main() {
    int n;
    cin>>n;
    char arr[n];
    int ans=solve(n,0,0,arr,0);
    cout<<ans;
    
    return 0;
}
int solve(int n,int os,int cs,char arr[],int c){
    int a=0;
    if(os==n && cs==n){
        for(int i=0;i<c;i++){
        cout<<arr[i];
    }
    cout<<"\n";
        return 1;
        
    }
    else{
        if(os<n){
            if(cs<os){
                arr[c]='(';
                a+=solve(n,os+1,cs,arr,c+1);
                arr[c]=')';
                a+=solve(n,os,cs+1,arr,c+1);
                
            }
            
            else{
                arr[c]='(';
                a+=solve(n,os+1,cs,arr,c+1);
            
            }
        }
        else{
            if(cs<os){
                arr[c]=')';
                a+=solve(n,os,cs+1,arr,c+1);
                
            }
        }
       
    }
     
        return a;
    

    
    
}