Envío 1575

Código

package main

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

func result_sum(a_sum []int, p int , q int) {
  result := a_sum[q]
  if p > 0 {
    result -= a_sum[p-1]
  }
  fmt.Println(result)
}

func main() {
  scanner := bufio.NewScanner(os.Stdin)
	scanner.Split(bufio.ScanWords)

	scanner.Scan()
	n, _ := strconv.Atoi(scanner.Text())
  
  a := make([]int, n)
  a_sum := make([]int, n)
  sum := 0
  for i := 0; i < n; i++ {
    scanner.Scan()
		a[i], _ = strconv.Atoi(scanner.Text())
    sum += a[i]
    a_sum[i] = sum
  }
  
  var c int
	scanner.Scan()
	c, _ = strconv.Atoi(scanner.Text())
  
  for i := 0; i < c; i++ {

    scanner.Scan()
    p, _ := strconv.Atoi(scanner.Text())
		
    scanner.Scan()
    q, _ := strconv.Atoi(scanner.Text())
    
    result_sum(a_sum, p, q)
  }

}