/* Pattern problem
   ...
   1 2 3 4
   2 3 4
   3 4
   4
*/

#include  <stdio.h>
#include  <conio.h>

void main()
{
    int  i, j, n ;
    clrscr() ;
    printf("Enter the number of lines: ") ;
    scanf("%d", &n) ;
    printf("Required pattern is as follows: \n") ;
    for(i=n ; i>=1 ; i--)
        {
            for(j=i ; j>=1 ; j--)
                printf("%d ", j) ;
            printf("\n") ;
        }
    getch();
}

/*
Output:

Enter the number of lines: 3
Required pattern is as follows:
3 2 1
2 1
1
*/