var n = +prompt("Сколько городов вывести?", "")

var populated = [

  {name: "Tokio", population: 37555},

  {name: "Jakarta", population: 29959},

  {name: "Deli", population: 24134}

];

​

​

function decrease(x, y) {

    if (x.population > y.population) {

        return -1;

    };

    if (x.population < y.population) {

        return 1;

    };

    return 0;

};

​

populated.sort(decrease);

​

for (var i = 0; i < n; i++) { 

    console.log(populated[i].name); 

};

​