HENNGE GoLang Code Challenge

mission1.go

package main

import (
	"bufio"
	"os"
	"strconv"
	"fmt"
	"log"
	"strings"
  )

func main() {
	var (
		scanner *bufio.Scanner;
		iterations int;
		calculated_values []int;
	)

	scanner = bufio.NewScanner(os.Stdin);
	iterations = read_iterations(scanner);
	calculated_values = make([]int, iterations);

	process_numbers_recursive(scanner, &calculated_values, 0, iterations);
	print_values_recursive(calculated_values);
	os.Exit(0);
}

func read_iterations(scanner *bufio.Scanner) int {
	scanner.Scan();
	n, err := strconv.Atoi(scanner.Text());
	if err != nil {
		log.Fatal(err);
	}
	return n;
}

func process_numbers_recursive(scanner *bufio.Scanner, calculated_values *[]int, iteration int, iterations int) {
  if ( iteration > (iterations - 1) ) { return; }
	
	//Skip amount of numbers
	scanner.Scan();

	//String split the actual numbers
	scanner.Scan();
	numbers_slice := strings.Split(scanner.Text(), " ");
	solution := calculate_square_recurisve(numbers_slice);

	(*calculated_values)[iteration] = solution;
	
	process_numbers_recursive(scanner, calculated_values, iteration + 1, iterations);
}

func calculate_square_recurisve(number_slice []string) int {
	if ( len(number_slice) <= 0 ) { return 0; }

	number, err := strconv.Atoi(number_slice[0]);
	if ( err != nil ) {
		log.Fatal(err);
	}

	if ( number <= 0 ) {
		return calculate_square_recurisve(number_slice[1:])
	}
	
	return (number * number) + calculate_square_recurisve(number_slice[1:]);
}

func print_values_recursive(calculated_values []int) {
	if ( len(calculated_values) < 1 ) { return; }
	fmt.Println( calculated_values[0] );
	print_values_recursive( calculated_values[1:] );
}

This was the code used to get me an interview at the Japanese company HENNGE, for a Back-End Software Developer.

The request was to make a script/program that handled an input stream of numbers and (ignoring negatives) square them, and add each together without using a for loop.

e.g.

2 (iterations)
4 (first iteration has 4 numbers)
5 32 -5 44 (4 numbers)
5 (second iteration has 5 numbers)
9 -1 81 72 -33 (5 numbers)

would return

2985
11826

hey, did you get invited for HR and tech interviews? did you get the selected for GIP?

hey, did you get invited for HR and tech interviews? did you get the selected for GIP?

I'm not sure, this did get me an interview but only one before I was rejected. This was back in 2019 though, the company is probably different now.