Envío 3562

Código

const readline = require('readline');
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

let lineCounter = 0;
let subTotalsArray;

function sumSubTotals(initialArray) {
  let currentSum = 0
  let sumsArray = []
  
  for(let i = 0; i < initialArray.length; i++) {

   currentSum = Number(initialArray[i]) + currentSum;
    sumsArray.push(currentSum);
}

  return sumsArray
}

const sumSubArray = (fromIndex, toIndex) => {
  if (Number(fromIndex) === 0) return subTotalsArray[toIndex]
  return subTotalsArray[Number(toIndex)] - subTotalsArray[Number(fromIndex) - 1];
}

rl.on("line", (line) => {
 ++lineCounter;
 if (lineCounter === 2) {
  // Run the initial algorithm
  const initialArray = line.split(" ");
  subTotalsArray = sumSubTotals(initialArray)
 }

 if (lineCounter > 3) {
   // these are the inputs Q & P
   const [Q, P] = line.split(" ");
   console.log(sumSubArray(Q, P))
 }
})