leetcode-visual/T164-bucket-sort.html at main · houbb/leetcode-visual · GitHub

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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>T164 最大间距桶排序可视化</title>
<style>
  body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    margin: 20px;
    background: #f5f5f5;
  }
  h1 {
    text-align: center;
  }
  a#homeLink {
    display: inline-block;
    margin-bottom: 15px;
    text-decoration: none;
    font-weight: bold;
    color: #007acc;
  }
  .input-area {
    margin-bottom: 15px;
    text-align: center;
  }
  input[type="text"] {
    width: 60%;
    padding: 6px 10px;
    font-size: 16px;
  }
  input[type="number"] {
    width: 60px;
    padding: 4px;
    font-size: 16px;
  }
  button {
    margin-left: 10px;
    padding: 6px 12px;
    font-size: 16px;
    cursor: pointer;
  }
  #arrayContainer {
    margin: 20px auto;
    width: 90%;
    display: flex;
    justify-content: center;
    gap: 6px;
    flex-wrap: wrap;
  }
  .array-item {
    width: 40px;
    height: 40px;
    background: #3498db;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 6px;
    font-weight: bold;
    user-select: none;
    transition: background-color 0.3s;
  }
  .highlight {
    background-color: #e74c3c !important;
  }
  .bucket {
    border: 2px dashed #888;
    border-radius: 6px;
    padding: 10px;
    margin: 10px;
    min-width: 60px;
    min-height: 40px;
    text-align: center;
    background-color: #ecf0f1;
    position: relative;
  }
  .bucket-label {
    font-size: 12px;
    margin-bottom: 4px;
    color: #555;
  }
  #bucketsContainer {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 20px;
    gap: 6px;
  }
  #log {
    background-color: #111;
    color: #eee;
    font-family: monospace;
    padding: 12px;
    height: 200px;
    overflow-y: auto;
    white-space: pre-wrap;
    border-radius: 6px;
    margin-top: 20px;
  }
  #infoArea {
    margin-top: 15px;
    font-size: 16px;
    text-align: center;
    min-height: 24px;
  }
</style>
</head>
<body>
  <h1>力扣 T164 最大间距桶排序可视化</h1>
  <a href="index.html" id="homeLink">【返回首页】</a>
  <div class="input-area">
    <label for="inputArray">输入数组（逗号分隔）: </label>
    <input type="text" id="inputArray" value="3,6,9,1,24,25,48" />
    <label for="intervalInput">动画间隔（秒）:</label>
    <input type="number" id="intervalInput" value="1" min="0.1" step="0.1" />
    <button id="startBtn">开始可视化</button>
  </div>

  <div id="arrayContainer"></div>
  <div id="bucketsContainer"></div>

  <div id="infoArea"></div>
  <div id="log"></div>

<script>
(() => {
  const startBtn = document.getElementById("startBtn");
  const inputArray = document.getElementById("inputArray");
  const intervalInput = document.getElementById("intervalInput");
  const arrayContainer = document.getElementById("arrayContainer");
  const bucketsContainer = document.getElementById("bucketsContainer");
  const logArea = document.getElementById("log");
  const infoArea = document.getElementById("infoArea");

  let animationInterval = 1000;
  let timerId = null;

  // 渲染数组
  function renderArray(arr, highlightIndices = []) {
    arrayContainer.innerHTML = "";
    arr.forEach((v, i) => {
      const div = document.createElement("div");
      div.className = "array-item";
      div.textContent = v;
      if (highlightIndices.includes(i)) {
        div.classList.add("highlight");
      }
      arrayContainer.appendChild(div);
    });
  }

  // 渲染桶状态
  function renderBuckets(buckets, min, bucketWidth, highlightIndex = -1) {
    bucketsContainer.innerHTML = "";
    buckets.forEach((bucket, i) => {
      const div = document.createElement("div");
      div.className = "bucket";
      if (i === highlightIndex) {
        div.style.backgroundColor = "#f39c12";
      } else {
        div.style.backgroundColor = "#ecf0f1";
      }
      const label = document.createElement("div");
      label.className = "bucket-label";
      label.textContent = `桶${i}`;
      div.appendChild(label);

      if (bucket[0] === Number.MAX_SAFE_INTEGER) {
        div.appendChild(document.createTextNode("空"));
      } else {
        div.appendChild(document.createTextNode(`最小: ${bucket[0]}, 最大: ${bucket[1]}`));
      }
      bucketsContainer.appendChild(div);
    });
  }

  // 输出日志，自动滚动到底部
  function log(msg) {
    logArea.textContent += msg + "\n";
    logArea.scrollTop = logArea.scrollHeight;
  }

  // 清理日志和信息
  function resetUI() {
    logArea.textContent = "";
    infoArea.textContent = "";
    bucketsContainer.innerHTML = "";
    arrayContainer.innerHTML = "";
  }

  // 主动画函数：桶排序可视化
  async function visualizeMaximumGap(arr, intervalSec) {
    resetUI();
    if (arr.length < 2) {
      infoArea.textContent = "数组长度小于2，无需排序，最大间距为0";
      log("数组长度小于2，直接返回0");
      renderArray(arr);
      return;
    }

    log(`输入数组: [${arr.join(", ")}]`);
    renderArray(arr);

    let min = Number.MAX_SAFE_INTEGER;
    let max = Number.MIN_SAFE_INTEGER;
    for (const num of arr) {
      if (num > max) max = num;
      if (num < min) min = num;
    }
    log(`最小值: ${min}, 最大值: ${max}`);

    if (min === max) {
      log("最小值和最大值相同，最大间距为0");
      infoArea.textContent = "所有元素相同，最大间距为0";
      return;
    }

    const bucketSize = arr.length + 1;
    let buckets = new Array(bucketSize);
    for (let i = 0; i < bucketSize; i++) {
      // 用大整数代替Integer.MAX_VALUE
      buckets[i] = [Number.MAX_SAFE_INTEGER, Number.MIN_SAFE_INTEGER];
    }

    // 计算桶宽度
    const bucketWidth = Math.ceil((max - min) / bucketSize);
    log(`桶数量: ${bucketSize}, 桶宽度: ${bucketWidth}`);

    // 显示初始空桶
    renderBuckets(buckets, min, bucketWidth);

    // 放入桶中
    for (let i = 0; i < arr.length; i++) {
      const num = arr[i];
      let bucketIndex = Math.floor((num - min) / bucketWidth);
      if (bucketIndex >= bucketSize) bucketIndex = bucketSize - 1;

      infoArea.textContent = `第${i + 1}个元素 ${num} 放入桶 ${bucketIndex}`;
      log(`元素 ${num} 计算桶索引: ${bucketIndex}`);

      // 高亮当前元素
      renderArray(arr, [i]);
      // 高亮当前桶
      renderBuckets(buckets, min, bucketWidth, bucketIndex);

      // 更新桶内最大最小值
      buckets[bucketIndex][0] = Math.min(buckets[bucketIndex][0], num);
      buckets[bucketIndex][1] = Math.max(buckets[bucketIndex][1], num);

      log(`更新桶${bucketIndex} => 最小值: ${buckets[bucketIndex][0]}, 最大值: ${buckets[bucketIndex][1]}`);

      await sleep(intervalSec);
    }

    // 计算最大间距
    let maxGap = 0;
    let prev = min;
    infoArea.textContent = "开始计算最大间距...";
    renderBuckets(buckets, min, bucketWidth);

    for (let i = 0; i < buckets.length; i++) {
      if (buckets[i][0] === Number.MAX_SAFE_INTEGER) {
        log(`桶${i}为空，跳过`);
        continue;
      }

      let gap = buckets[i][0] - prev;
      log(`桶${i}的最小值 ${buckets[i][0]} - 上一个最大值 ${prev} = 间距 ${gap}`);
      if (gap > maxGap) {
        maxGap = gap;
        log(`更新最大间距为 ${maxGap}`);
      }

      prev = buckets[i][1];

      infoArea.textContent = `检查桶${i}，当前最大间距: ${maxGap}`;
      renderBuckets(buckets, min, bucketWidth, i);

      await sleep(intervalSec);
    }

    infoArea.textContent = `最大间距计算完成: ${maxGap}`;
    log(`返回最大间距: ${maxGap}`);

    // 最后高亮全部数组
    renderArray(arr);
    renderBuckets(buckets, min, bucketWidth);
  }

  function sleep(seconds) {
    return new Promise(resolve => setTimeout(resolve, seconds * 1000));
  }

  // 事件绑定
  startBtn.addEventListener("click", () => {
    if (timerId) {
      clearTimeout(timerId);
      timerId = null;
    }
    const rawInput = inputArray.value.trim();
    if (!rawInput) {
      alert("请输入有效数组！");
      return;
    }
    let arr = rawInput.split(",").map(s => parseInt(s.trim())).filter(n => !isNaN(n));
    if (arr.length === 0) {
      alert("请输入有效数字数组！");
      return;
    }
    let intervalSec = parseFloat(intervalInput.value);
    if (isNaN(intervalSec) || intervalSec <= 0) {
      intervalSec = 1;
    }
    animationInterval = intervalSec;

    visualizeMaximumGap(arr, animationInterval);
  });

  // 页面加载时默认渲染数组
  renderArray(inputArray.value.split(",").map(s => parseInt(s.trim())).filter(n => !isNaN(n)));
})();
</script>
</body>
</html>