[프로그래머스 | Lv. 1 | JavaScript] 실패율

 

Link

코딩테스트 연습 - 실패율

 

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문제

풀이

(1)

function solution(N, stages) {
    let arr = new Array(N + 2).fill(0)
    for (let s of stages) {
        arr[s] += 1;
    }
    
    let total = stages.length;
    let pre = 0;
    let fail = []
    for (let i = 1; i < arr.length - 1; i++) {
        let a = arr[i]
        fail.push([i, a/(total - pre)]);
        pre += a;
    }
    
    fail.sort((a, b) => b[1] - a[1] || a[0] - b[0])
    
    return fail.map(f => f[0]);
}