function main(input = '') {
  if (!input) throw Error;

  let lines = input.split('\n');
  let length = parseInt(lines[0]);
  let nums = lines[1]
    .split(' ')
    .map((val) => parseInt(val))
    .sort();

  if (length % 2 === 0) {
    return `${(nums[length / 2] + nums[length / 2 - 1]) / 2}`;
  } else {
    return `${nums[Math.ceil(length / 2)]}`;
  }
}

const { readFileSync, existsSync } = require('fs');
const stdin = '/dev/stdin';

if (existsSync(stdin)) {
  const input = readFileSync(stdin, 'utf8');
  console.log(main(input));
}

module.exports = main;