public static int first ( int a , int b , int c ) {
  a %= b ;
  for ( int i = 1 ;
  i <= b ;
  i ++ ) {
    a = a * 10 ;
    if ( a / b == c ) return i ;
    a %= b ;
  }
  return - 1 ;
}

public static int first ( int a , int b , int c ) { a %= b ; for ( int i = 1 ; i <= b ; i ++ ) { a = a * 10 ; if ( a / b == c ) return i ; a %= b ; } return - 1 ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))) (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: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (identifier))) consequence: (return_statement (identifier))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (return_statement (unary_expression operand: (decimal_integer_literal)))))