SOFTEER 성적평균 구하기 (JS)

 

const fs = require('fs');
let input = fs.readFileSync('/dev/stdin').toString().split('\n');
//var input = [ '5 3', '10 50 20 70 100', '1 3', '3 4', '1 5' ]; => 이렇게 들어옴

var score = input[1].split(' ').map(Number); // Convert the second element to an array of numbers
//console.log(score);

for (var i = 2; i < input.length; i++) {
  let [start, end] = input[i].split(' ').map(Number); // Convert the current element to an array of numbers

  let avg = score.slice(start - 1, end).reduce((acc, cur) => acc + cur, 0) / (end - start + 1);
  console.log(avg.toFixed(2));
}