shape numbers reverse triangle

/* Write a program in C++ to display such a pattern for n number of rows using numbers. There will be odd numbers in each row. The first and last number of each row will be 1 and the middle column will be the row number. N numbers of columns will appear in the 1st row.
Sample Output:
 Input number of rows: 7                                                                                      
     1234567654321                                                                                            
      12345654321                                                                                             
       123454321                                                                                              
        1234321                                                                                               
         12321                                                                                                
          121                                                                                                 
           1             */

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
    int num;
    cout<<"enter the number of rows:"<<endl;
    cin>>num;
    for(int r=1;r<=num;r++){
        
        for(int s=0;s<=r-1;s++){
            cout<<' ';
        }
            
        for(int c1=1;c1<num;c1++){
            cout<<c1;
        }
        
        for(int c2=num;c2>=1;c2--){
            cout<<c2;
        }
        
        cout<<endl;
        num=num-1;
    }
    
    
    
    
    
    return 0;
}