Function to return the number of subsequences which have at least one consecutive pair with difference less than or equal to 1
static int count_required_sequence ( int n , int [ ] arr ) { int total_required_subsequence = 0 ; int total_n_required_subsequence = 0 ; int [ , ] dp = new int [ N , 2 ] ; for ( int i = 0 ; i < n ; i ++ ) {