177 lines
6.9 KiB
HTML
177 lines
6.9 KiB
HTML
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<!DOCTYPE html>
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<html lang="zh-Hans">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>001. 两数之和 – 图解</title>
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<link rel="stylesheet" href="../shared/style.css">
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<style>
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/* page-specific overrides */
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.vis-area { min-height: 120px; padding: 16px 0; }
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.code-section { margin-top: 16px; }
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</style>
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</head>
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<body>
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<div class="container">
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<h1>🟢 001. 两数之和 <span class="badge easy">简单</span></h1>
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<p class="subtitle">分类：哈希 ｜ LeetCode Hot 100</p>
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<!-- 控制面板 -->
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<div class="controls" id="controls">
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<label for="inputArea">输入：</label>
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<input type="text" id="inputArea" placeholder="默认示例，可自定义">
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<button id="applyBtn" class="primary">生成图解</button>
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<select id="exampleSelect"></select>
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<span style="flex:1"></span>
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<button id="prevBtn">◀ 上一步</button>
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<button id="nextBtn">下一步 ▶</button>
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<button id="jumpBtn">⏭ 跳到结果</button>
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<button id="autoBtn">自动播放</button>
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<button id="resetBtn">重置</button>
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</div>
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<!-- 步骤流水线 -->
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<div class="pipeline" id="pipeline"></div>
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<!-- 提示条 -->
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<div class="hint info" id="hintBox">
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<span id="stepInfo"></span><br>
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<span id="hintText"></span>
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</div>
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<!-- 可视化面板 -->
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<div class="panels">
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<div class="panel" id="mainPanel">
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<h3>📊 可视化</h3>
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<div class="vis-area" id="vizArea">点击「生成图解」开始</div>
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</div>
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<div class="panel-grid">
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<div class="panel" id="detailPanel">
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<h3>📝 当前步骤详情</h3>
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<div id="detailContent">等待开始...</div>
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</div>
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<div class="panel" id="resultPanel">
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<h3>✅ 结果</h3>
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<div id="resultContent">等待完成...</div>
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</div>
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</div>
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</div>
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<!-- 代码 -->
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<div class="panel code-section">
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<h3>💻 参考代码（Python）</h3>
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<div id="codeArea"></div>
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</div>
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<footer>Powered by QwenPaw · 图解算法 · LeetCode Hot 100</footer>
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</div>
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<script src="../shared/algo-viz.js"></script>
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<script>
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"use strict";
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(function() {
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// ========== Algorithm Logic ==========
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const examples = [
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{input: [2,7,11,15], target: 9, label: '示例1: nums=[2,7,11,15], target=9'},
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{input: [3,2,4], target: 6, label: '示例2: nums=[3,2,4], target=6'},
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{input: [3,3], target: 6, label: '示例3: nums=[3,3], target=6'},
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];
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let nums, target, steps, stepCtrl;
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function buildSteps(arr, tgt) {
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nums = arr; target = tgt;
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steps = [];
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const map = {};
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steps.push({stage:'start', msg:'开始遍历数组，用哈希表记录已访问的元素', highlights:{}, mapKeys:[], idx:-1});
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for (let i = 0; i < arr.length; i++) {
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const complement = tgt - arr[i];
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steps.push({stage:'check', msg:`检查 nums[${i}]=${arr[i]}，需要的补数 complement = ${tgt} - ${arr[i]} = ${complement}`, highlights:{[i]:'orange'}, mapKeys:Object.entries(map), idx:i, complement});
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if (complement in map) {
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steps.push({stage:'found', msg:`找到！补数 ${complement} 在哈希表中，对应索引 ${map[complement]}`, highlights:{[i]:'green', [map[complement]]:'green'}, mapKeys:Object.entries(map), idx:i, result:[map[complement], i]});
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return;
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}
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map[arr[i]] = i;
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steps.push({stage:'store', msg:`补数 ${complement} 不在哈希表中，将 nums[${i}]=${arr[i]} → 索引 ${i} 存入哈希表`, highlights:{[i]:'blue'}, mapKeys:Object.entries(map), idx:i});
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}
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steps.push({stage:'done', msg:'遍历完毕，未找到满足条件的两个数', highlights:{}, mapKeys:Object.entries(map), idx:-1});
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}
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function render(step) {
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if (!step) return;
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const s = steps[step];
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let viz = renderArray(nums, {highlights: s.highlights});
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if (s.complement !== undefined) {
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viz += '<div style="margin-top:8px;color:#64748b;">complement = ' + s.complement + '</div>';
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}
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$('vizArea').innerHTML = viz;
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let detail = '<div class="calc-block">' + s.msg + '</div>';
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if (s.mapKeys && s.mapKeys.length > 0) {
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detail += '<div style="margin-top:8px;"><b>哈希表：</b>';
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s.mapKeys.forEach(([k,v]) => { detail += `<code>${k}→${v}</code> `; });
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detail += '</div>';
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}
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$('detailContent').innerHTML = detail;
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if (s.stage === 'found') {
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$('resultContent').innerHTML = `<div class="final-answer">返回 <b>[${s.result}]</b><br>nums[${s.result[0]}] + nums[${s.result[1]}] = ${nums[s.result[0]]} + ${nums[s.result[1]]} = ${target}</div>`;
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} else if (s.stage === 'done') {
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$('resultContent').innerHTML = '<div class="final-answer" style="border-color:#f87171;background:#fef2f2;">未找到答案</div>';
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}
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$('hintText').textContent = s.msg;
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const stages = ['start→开始','check→检查','store→存入','found→找到'];
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$('pipeline').innerHTML = stages.map(st => {
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const [key, label] = st.split('→');
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return `<span class="pipe-step ${s.stage===key?'active':''}">${label}</span>`;
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}).join('<i>→</i>');
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}
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function init() {
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const sel = $('exampleSelect');
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examples.forEach((e,i) => { sel.innerHTML += `<option value="${i}">${e.label}</option>`; });
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$('inputArea').value = 'nums=[2,7,11,15], target=9';
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buildSteps(examples[0].input, examples[0].target);
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stepCtrl = new StepController({onStep: render});
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stepCtrl.setSteps(steps.map((_,i) => i));
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$('stepInfo').textContent = `步骤 1 / ${steps.length}`;
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stepCtrl.onStep = (idx) => { render(idx); $('stepInfo').textContent = `步骤 ${idx+1} / ${steps.length}`; };
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$('applyBtn').onclick = () => {
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const m = $('inputArea').value.match(/nums=\[([^\]]+)\].*target=(\d+)/);
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if (!m) { alert('格式: nums=[2,7,11,15], target=9'); return; }
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const arr = m[1].split(',').map(Number);
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const tgt = parseInt(m[2]);
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buildSteps(arr, tgt);
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stepCtrl.setSteps(steps.map((_,i) => i));
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render(0);
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$('stepInfo').textContent = `步骤 1 / ${steps.length}`;
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};
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$('exampleSelect').onchange = () => {
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const e = examples[parseInt($('exampleSelect').value)];
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$('inputArea').value = `nums=[${e.input}], target=${e.target}`;
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buildSteps(e.input, e.target);
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stepCtrl.setSteps(steps.map((_,i) => i));
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render(0);
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};
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$('prevBtn').onclick = () => stepCtrl.prev();
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$('nextBtn').onclick = () => stepCtrl.next();
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$('jumpBtn').onclick = () => stepCtrl.jumpToEnd();
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$('autoBtn').onclick = () => { const on = stepCtrl.toggleAuto(); $('autoBtn').textContent = on ? '暂停' : '自动播放'; };
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$('resetBtn').onclick = () => { stepCtrl.reset(); $('autoBtn').textContent = '自动播放'; };
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}
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init();
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$('codeArea').innerHTML = renderCode(`def twoSum(nums, target):
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hashmap = {}
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for i, num in enumerate(nums):
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complement = target - num
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if complement in hashmap:
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return [hashmap[complement], i]
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hashmap[num] = i
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return []`, {lang:'Python'});
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})();
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</script>
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</body>
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</html>
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