1330.go

package main

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

func main() {
	in := bufio.NewReader(os.Stdin)
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()

	var n int
	fmt.Fscan(in, &n)
	sum := make([]int, n + 1)
	var k int
	for i := 0; i < n; i++ {
		fmt.Fscan(in, &k)
		sum[i + 1] = sum[i] + k
	}
	var m int
	fmt.Fscan(in, &m)
	var from, to int
	for i := 0; i < m; i++ {
		fmt.Fscan(in, &from, &to)
		fmt.Fprintln(out, sum[to] - sum[from - 1])
	}
}