Envío 4125

Código

package main

import (
	"fmt"
)

func solve(a []int, sums []int, p, q int) {
	if p == 0 {
		fmt.Println(sums[q])
		return
	}

	if p-q == 0 {
		fmt.Println(a[q])
		return
	}
	fmt.Println(sums[q] - sums[p-1])
}

func loadSums(a []int, sums []int, n int) {
	sum := 0
	for i := 0; i < n; i++ {
		sum += a[i]
		sums[i] = sum
	}
}

func main() {
	var n int
	var p, q int

	_, err := fmt.Scanf("%d", &n)
	if err != nil {
		panic(err)
	}
	a := make([]int, n)
	sums := make([]int, n)
	for i := 0; i < n; i++ {
		_, err := fmt.Scanf("%d", &a[i])
		if err != nil {
			panic(err)
		}
	}

	_, err = fmt.Scanf("%d", &n)
	if err != nil {
		panic(err)
	}

	for i := 0; i < n; i++ {

		_, err := fmt.Scanf("%d %d", &p, &q)
		if err != nil {
			panic(err)
		}
		loadSums(a, sums, n)
		solve(a, sums, p, q)
	}
}