SOURCE

let people = [[6,0],[5,0],[4,0],[3,2],[2,2],[1,4]]
let temp = {}
for(let i =0; i<people.length;i++){
    console.log(people[i][0])
    for(let j = i+1;j<people.length;j++){
        if(people[i][1]>people[j][1]){
            [people[i],people[j]] = [people[j],people[i]]
        }
        if(people[i][1]==people[j][1]){
            if(people[i][0]>people[j][0]){
                [people[i],people[j]] = [people[j],people[i]]
            }
        }
    }
}
for(key in people){
    if(temp[people[key][0]]===undefined){
        temp[people[key][0]]=1
    }else{
        temp[people[key][0]]++
    }
}
let len = people.length
for(done in people){
    //let o = len - getheight(people[done][0])
    //console.log(o)
    //if(resul.length)
}
let result = []
console.log(people)
console.log(temp)