algorithm/1.html at main · Orekrigo/algorithm · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>算法实验一</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        body {
            width: 100%;
            height: 100%;
            background-image: url("image/yuzhou2.jpeg");
            background-size: 100% 100%;
            background-repeat: no-repeat;
            background-attachment: fixed;
        }

        .first-container {
            text-align: center;
            padding-top: 200px;
            font-size: large;
        }

        .first-container input {
            margin-bottom: 20px;
            border-radius: 5px;
            font-size: 30px;
        }

        .first-container div {
            padding-right: 300px;
            color: white;
            font-size: 25px;
        }

        .first-container button {
            font-size: 25px;
            border-radius: 5px;
            background-color: green;
            cursor: pointer;
        }

        .second-container {
            text-align: center;
            padding-top: 200px;
            font-size: large;
        }

        .second-container input {
            margin-bottom: 20px;
            border-radius: 5px;
            font-size: 30px;
        }

        .second-container div {
            padding-right: 300px;
            color: white;
            font-size: 25px;
        }

        .second-container button {
            font-size: 25px;
            border-radius: 5px;
            background-color: green;
            cursor: pointer;
        }

        .second-container #ccc {
            padding-left: 20px;
        }
    </style>
</head>

<body>
    <div class="container">
        <div class="first-container">
            <input id="firstnum" type="text" placeholder="请在这里输入">
            <button onclick="firstclick()">确定</button>
            <div>最大子段和：<span id="res1"></span></div>
        </div>
        <div class="second-container">
            <input id="secondnum" type="text" placeholder="请在这里输入">
            <button onclick="secondclick()">确定</button>
            <div>众数： <span id="res2"> </span> <span id="ccc">重数：</span> <span id="res3"></span></div>
        </div>
    </div>
    <script>
        function Status(l, r, m, i) {
            this.lSum = l;
            this.rSum = r;
            this.mSum = m;
            this.iSum = i;
        }

        const pushUp = (l, r) => {
            const iSum = l.iSum + r.iSum;
            const lSum = Math.max(l.lSum, l.iSum + r.lSum);
            const rSum = Math.max(r.rSum, r.iSum + l.rSum);
            const mSum = Math.max(Math.max(l.mSum, r.mSum), l.rSum + r.lSum);
            return new Status(lSum, rSum, mSum, iSum);
        }

        const getInfo = (a, l, r) => {
            if (l === r) {
                return new Status(a[l], a[l], a[l], a[l]);
            }
            const m = (l + r) >> 1;
            const lSub = getInfo(a, l, m);
            const rSub = getInfo(a, m + 1, r);
            return pushUp(lSub, rSub);
        }

        var maxSubArray = function (nums) {
            return getInfo(nums, 0, nums.length - 1).mSum;
        }

        function firstclick() {
            var res1 = document.getElementById('res1');
            var num = document.getElementById('firstnum');
            nums = num.value;
            nums = nums.split(" ");
            var nums2 = [];
            for (let i = 0; i < nums.length; i++) {
                nums2.push(parseInt(nums[i]));
            }
            var result1 = maxSubArray(nums2);
            if (result1 < 0) { res1.innerText = 0; }
            else {
                res1.innerText = result1;
            }
        }


        var zhongshu = 0;
        var chongshu = 0;

        function split(a, left, right) {
            if (left > right) return;
            var mid = Math.floor((left + right) / 2);
            var lleft = left;
            var rright = right;
            for (; left < mid && a[left] != a[mid]; left++);
            for (; right > mid && a[right] != a[mid]; right--);
            if (right - left + 1 >= chongshu) {
                chongshu = right - left + 1;
                zhongshu = a[mid];
            }
            if (left - lleft >= chongshu)//如果左侧的个数大于重数的话就对左侧数组继续进行操作
            {
                split(a, lleft, left - 1);
            }
            if (rright - right >= chongshu) {
                split(a, right + 1, rright);
            }
        }

        function secondclick() {
            var k;
            var res2 = document.getElementById('res2');
            var res3 = document.getElementById('res3');
            var num = document.getElementById('secondnum');
            nums = num.value;
            nums = nums.split(" ");
            nums2 = [];
            for (let i = 0; i < nums.length; i++) {
                nums2.push(parseInt(nums[i]));
            }
            nums2 = nums2.sort()
            split(nums2, 0, nums2.length - 1);
            res2.innerText = zhongshu;
            res3.innerText = chongshu;
        }


    </script>
</body>

</html>