Envío 5097

Código

const readline = require('readline');

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


rd.question('', n => {
  rd.question('', numbersInput => {
    const numbers = numbersInput.split(' ').map(n => Number(n));
    let finish = false;
    let firstRightElementIndex = 1;
    if (numbers.length > 2) {
      let rightSum = 0, leftSum = 0;
      for (let i = 0; i < firstRightElementIndex; i++) {
        leftSum += numbers[i];
      }
      for (let i = firstRightElementIndex; i < numbers.length; i++) {
        rightSum += numbers[i];
      }

      finish = (leftSum > 0) && (rightSum < 0);
      firstRightElementIndex++;

      while (firstRightElementIndex < numbers.length && !finish) {
        leftSum += numbers[firstRightElementIndex-1];
        rightSum -= numbers[firstRightElementIndex-1];
        finish = (leftSum > 0) && (rightSum < 0);
        firstRightElementIndex++;
	    }

    }

    if (finish) {
      console.log(firstRightElementIndex-1);
    } else {
      console.log('Impossible');
    }
    process.exit();
  });
});