static int largestSquareFactor ( int num ) {
  int answer = 1 ;
  for ( int i = 2 ;
  i < Math . sqrt ( num ) ;
  ++ i ) {
    int cnt = 0 ;
    int j = i ;
    while ( num % j == 0 ) {
      cnt ++ ;
      j *= i ;
    }
    if ( ( cnt & 1 ) != 0 ) {
      cnt -- ;
      answer *= Math . pow ( i , cnt ) ;
    }
    else {
      answer *= Math . pow ( i , cnt ) ;
    }
  }
  return answer ;
}

static int largestSquareFactor ( int num ) { int answer = 1 ; for ( int i = 2 ; i < Math . sqrt ( num ) ; ++ i ) { int cnt = 0 ; int j = i ; while ( num % j == 0 ) { cnt ++ ; j *= i ; } if ( ( cnt & 1 ) != 0 ) { cnt -- ; answer *= Math . pow ( i , cnt ) ; } else { answer *= Math . pow ( i , cnt ) ; } } return answer ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) body: (block (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal))) consequence: (block (expression_statement (update_expression (identifier))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier)))))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))))))))) (return_statement (identifier))))