const row = require('fs').readFileSync('/dev/stdin','utf8').split('\n');
const number = Number(row[0]);
const data = row[1].split(' ').map(e => Number(e)).sort((a,b) => {
    return a-b;
});

let result;
if(number % 2 === 0) {
    result = (data[~~(number/2)] + data[~~(number/2)-1])/2
}else {
    result = data[(~~(number/2))];
}

console.log(result);