public static void main ( String [ ] args ) throws Exception {
  int [ ] nk = in . readA ( ) ;
  int n = nk [ 0 ] , k = nk [ 1 ] ;
  int [ ] [ ] mat = new int [ n ] [ n ] ;
  char [ ] [ ] inpMat = new char [ n ] [ ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    inpMat [ i ] = in . readLine ( ) . toCharArray ( ) ;
  };
}

public static void main ( String [ ] args ) throws Exception { int [ ] nk = in . readA ( ) ; int n = nk [ 0 ] , k = nk [ 1 ] ; int [ ] [ ] mat = new int [ n ] [ n ] ; char [ ] [ ] inpMat = new char [ n ] [ ] ; for ( int i = 0 ; i < n ; i ++ ) { inpMat [ i ] = in . readLine ( ) . toCharArray ( ) ; } ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (array_access array: (identifier) index: (decimal_integer_literal))) declarator: (variable_declarator name: (identifier) value: (array_access array: (identifier) index: (decimal_integer_literal)))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier)) dimensions: (dimensions_expr (identifier))))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier)) dimensions: (dimensions)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list))))))))