Driver code
public static void main ( String args [ ] ) { int arr [ ] = { 3 , 7 , 2 , 3 } ; int n = arr . length ; int m = 3 ; int ans = findLen ( arr , 0 , ( ( 1 << 8 ) - 1 ) , n , m ) ; if ( ans == - 1 ) System . out . print ( 0 ) ; else System . out . print ( ans ) ; } }