text: Program to find the N | C # program to find n - th number containing only 3 and 5. ; If n is odd , append 3 and move to parent ; If n is even , append 5 and move to parent ; Reverse res and return . ; Driver code
code: using System ; class GFG { if ( ( n & 1 ) == 1 ) { res = res + " 3 " ; n = ( n - 1 ) / 2 ; } else { res = res + " 5 " ; n = ( n - 2 ) / 2 ; } } string sb = Reverse ( res ) ; return sb ; } static void Main ( ) { int n = 5 ; Console . WriteLine ( findNthNo ( n ) ) ; } }