count-good-triplets_0310.html

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<html lang="en">

<head>
    <meta charset="UTF-8" />
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    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>count-good-triplets</title>
</head>

<body></body>
<script>
    const arr = [3, 0, 1, 1, 9, 7],
        a = 7,
        b = 2,
        c = 3;
    console.log(countGoodTriplets(arr, a, b, c));
    /**
     * @param {number[]} arr
     * @param {number} a
     * @param {number} b
     * @param {number} c
     * @return {number}
     */
    function countGoodTriplets(arr, a, b, c) {
        let count = 0;
        for (let i = 0; i < arr.length; i++) {
            for (let j = i + 1; j < arr.length; j++) {
                for (let k = j + 1; k < arr.length; k++) {
                    if (
                        Math.abs(arr[i] - arr[j]) <= a &&
                        Math.abs(arr[j] - arr[k]) <= b &&
                        Math.abs(arr[i] - arr[k]) <= c
                    )
                        count++;
                }
            }
        }
        return count;
    }
</script>

</html>