static String removeZeroesFromFront ( String str ) {
  String s ;
  int i = 0 ;
  while ( i < str . length ( ) && str . charAt ( i ) == '0' ) i ++ ;
  if ( i == str . length ( ) ) s = "0" ;
  else s = str . substring ( i , str . length ( ) - i ) ;
  return s ;
}

static String removeZeroesFromFront ( String str ) { String s ; int i = 0 ; while ( i < str . length ( ) && str . charAt ( i ) == '0' ) i ++ ; if ( i == str . length ( ) ) s = "0" ; else s = str . substring ( i , str . length ( ) - i ) ; return s ; }
(method_declaration (modifiers) type: (type_identifier) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal)))) body: (expression_statement (update_expression (identifier)))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) consequence: (expression_statement (assignment_expression left: (identifier) right: (string_literal))) alternative: (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier))))))) (return_statement (identifier))))