[JS] 백준 4344번 / 평균은 넘겠지 / 1차원 배열

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문제

4344번: 평균은 넘겠지

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정답

let fs = require("fs");
let filePath = process.platform === "linux" ? "/dev/stdin" : "test.txt";

let input = fs.readFileSync(filePath).toString().split("\n");
let num1 = input.shift();

for (let i = 0; i < num1; i++) {
  let score = input[i].split(" ").map(Number);
  let num2 = score.shift();
  let avg = score.reduce((a, b) => a + b) / num2;
  let topRank = score.filter(x => x > avg).length;
  console.log(((topRank / num2) * 100).toFixed(3) + "%");
}

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