197 lines
8.1 KiB
HTML
197 lines
8.1 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>086. 单词拆分 – 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>🟡 086. 单词拆分 <span class="badge medium">中等</span></h1>
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<p class="subtitle">分类：动态规划 ｜ 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: 'leetcode', dict: ['leet','code'], label: '示例1: "leetcode", ["leet","code"]'},
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{input: 'applepenapple', dict: ['apple','pen'], label: '示例2: "applepenapple", ["apple","pen"]'},
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{input: 'catsandog', dict: ['cats','dog','sand','and','cat'], label: '示例3: "catsandog"'},
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];
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let s, wordDict, steps, stepCtrl;
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function buildSteps(str, dict) {
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s = str; wordDict = dict; steps = [];
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const n = str.length;
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const dp = new Array(n + 1).fill(false);
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dp[0] = true;
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steps.push({stage:'init', msg:'dp[0]=true（空串可分割）', dp:[...dp], i:-1, j:-1, matched:false, matchWord:''});
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for (let i = 1; i <= n; i++) {
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steps.push({stage:'checkI', msg:`检查 dp[${i}]：能否将 s[0:${i}]="${s.slice(0,i)}" 分割`, dp:[...dp], i, j:-1, matched:false, matchWord:''});
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for (let j = 0; j < i; j++) {
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const sub = s.slice(j, i);
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const inDict = dp[j] && dict.includes(sub);
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if (dp[j]) {
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steps.push({stage:'tryJ', msg:`dp[${j}]=true，检查 s[${j}:${i}]="${sub}" ${inDict?'在字典中 ✅':'不在字典中 ❌'}`, dp:[...dp], i, j, matched:inDict, matchWord:sub});
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if (inDict) {
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dp[i] = true;
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steps.push({stage:'found', msg:`dp[${j}]=true 且 "${sub}" 在字典中 → dp[${i}]=true`, dp:[...dp], i, j, matched:true, matchWord:sub});
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break;
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}
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}
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}
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if (!dp[i]) {
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steps.push({stage:'fail', msg:`dp[${i}]=false（无法分割 s[0:${i}]）`, dp:[...dp], i, j:-1, matched:false, matchWord:''});
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}
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}
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steps.push({stage:'done', msg:dp[n]?`"${s}" 可以被分割`:`"${s}" 无法被分割`, dp:[...dp], i:n, j:-1, matched:dp[n], matchWord:''});
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}
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function render(step) {
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const st = steps[step];
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let viz = '<div style="margin-top:8px;"><b>字符串：</b></div>';
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viz += '<div style="display:flex;gap:2px;margin:8px 0;">';
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for (let i = 0; i < s.length; i++) {
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const inRange = st.j >= 0 && i >= st.j && i < st.i;
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const cls = inRange ? (st.matched ? 'green' : 'orange') : 'default';
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viz += `<span class="chip ${cls}" style="min-width:28px;font-size:14px;">${s[i]}</span>`;
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}
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viz += '</div>';
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viz += '<div style="display:flex;gap:2px;margin-top:-4px;">';
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for (let i = 0; i <= s.length; i++) {
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viz += `<span style="min-width:28px;text-align:center;font-size:10px;color:var(--text-muted);">${i}</span>`;
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}
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viz += '</div>';
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viz += '<div style="margin-top:8px;"><b>dp 状态：</b></div>';
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viz += '<div style="display:flex;gap:3px;flex-wrap:wrap;margin:4px 0;">';
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for (let i = 0; i <= s.length; i++) {
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const isCur = i === st.i;
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const cls = isCur ? 'orange' : (st.dp[i] ? 'green' : 'default');
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viz += `<span class="chip ${cls}" style="min-width:32px;font-size:12px;height:28px;">${st.dp[i]?'T':'F'}</span>`;
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}
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viz += '</div>';
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viz += '<div style="margin-top:8px;"><b>字典：</b></div>';
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viz += '<div style="display:flex;gap:4px;flex-wrap:wrap;margin:4px 0;">';
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wordDict.forEach(w => {
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const isMatch = w === st.matchWord;
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const cls = isMatch ? 'green' : 'default';
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viz += `<span class="chip ${cls}" style="min-width:auto;padding:4px 10px;font-size:13px;">"${w}"</span>`;
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});
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viz += '</div>';
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$('vizArea').innerHTML = viz;
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$('detailContent').innerHTML = '<div class="calc-block">' + st.msg + '</div>';
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if (st.stage === 'done') {
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$('resultContent').innerHTML = `<div class="final-answer">${st.matched ? `"${s}" 可以被分割 ✅` : `"${s}" 无法被分割 ❌`}</div>`;
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}
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$('hintText').textContent = st.msg;
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const stages = ['init→初始化','checkI→检查','tryJ→尝试','found→找到','fail→失败','done→完成'];
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$('pipeline').innerHTML = stages.map(st2 => {
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const [k,l] = st2.split('→');
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return `<span class="pipe-step ${st.stage===k?'active':''}">${l}</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 = 's="leetcode", dict=["leet","code"]';
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buildSteps(examples[0].input, examples[0].dict);
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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(/s="([^"]+)"\s*,\s*dict=\[([^\]]+)\]/);
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if (!m) { alert('格式: s="leetcode", dict=["leet","code"]'); return; }
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const dict = m[2].match(/"([^"]*)"/g).map(x => x.replace(/"/g, ''));
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buildSteps(m[1], dict);
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stepCtrl.setSteps(steps.map((_,i)=>i)); render(0); $('stepInfo').textContent = '步骤 1 / ' + steps.length;
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};
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$('exampleSelect').onchange = () => {
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const e = examples[parseInt($('exampleSelect').value)];
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$('inputArea').value = `s="${e.input}", dict=["${e.dict.join('","')}"]`;
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buildSteps(e.input, e.dict); stepCtrl.setSteps(steps.map((_,i)=>i)); 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 wordBreak(s, wordDict):
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n = len(s)
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dp = [False] * (n + 1)
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dp[0] = True
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word_set = set(wordDict)
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for i in range(1, n + 1):
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for j in range(i):
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if dp[j] and s[j:i] in word_set:
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dp[i] = True
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break
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return dp[n]`, {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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