HDE programming challenge

hde_challenge.go

package main

import (
	"fmt"
	"bytes"
	"strconv"
)

func main() {
	var N int
	fmt.Scanln(&N)
	readCases(N)
	fmt.Print(buffer.String())
}
var buffer bytes.Buffer
func readCases(N int) {
	if N == 0 {
		return
	}
	var X int
	fmt.Scanln(&X)
	buffer.WriteString(strconv.Itoa(readXs(X))+"\n")
	readCases(N - 1)
}
func readXs(x int) int {
	if x == 0 {
		return 0
	}
	var y int
	fmt.Scanf("%d", &y)
	if y >= 0 {
		return y * y + readXs(x - 1)
	} else {
		return readXs(x - 1)
	}
}