using System;

namespace MyCompiler {
    class Program {
        public static void Main(string[] args) {
            int rowNumber = 5;
            trianglePattern(rowNumber);
        }

        static void trianglePattern(int rowVal){
            //Number of rows in the pattern
            for(int row=1; row <= rowVal; row++){
                int spaces = rowVal - row;
                
                //Print total number of spaces
                for(int spa=0; spa < spaces; spa++){
                    Console.Write("  ");
                }
                
                //number of column in each row in left side
                for(int col = 1; col <= row; col++){
                    Console.Write(col + " ");
                }

                //number of column in each row in right side
                for(int col = row-1; col >= 1; col--){
                    Console.Write(col + " ");
                }
                
                //when one line is printed we need to add one new line
                Console.WriteLine(" ");
            }
        }
    }
}