int z_count = 0 ; Total 0 s present
int n = grid . GetLength ( 0 ) , m = grid . GetLength ( 1 ) ; bool [ , ] vis = new bool [ n , m ] ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < m ; j ++ ) { vis [ i , j ] = false ; } } int x = 0 , y = 0 ; for ( int i = 0 ; i < n ; ++ i ) { for ( int j = 0 ; j < m ; ++ j ) {