206 lines
8.5 KiB
HTML
206 lines
8.5 KiB
HTML
<!DOCTYPE html>
|
||
<html lang="zh-Hans">
|
||
<head>
|
||
<meta charset="UTF-8">
|
||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||
<title>060. 单词搜索 – 图解</title>
|
||
<link rel="stylesheet" href="../shared/style.css">
|
||
<style>
|
||
/* page-specific overrides */
|
||
.vis-area { min-height: 120px; padding: 16px 0; }
|
||
.code-section { margin-top: 16px; }
|
||
</style>
|
||
</head>
|
||
<body>
|
||
<div class="container">
|
||
<h1>🟡 060. 单词搜索 <span class="badge medium">中等</span></h1>
|
||
<p class="subtitle">分类：回溯 ｜ LeetCode Hot 100</p>
|
||
|
||
<!-- 控制面板 -->
|
||
<div class="controls" id="controls">
|
||
<label for="inputArea">输入：</label>
|
||
<input type="text" id="inputArea" placeholder="默认示例，可自定义">
|
||
<button id="applyBtn" class="primary">生成图解</button>
|
||
<select id="exampleSelect"></select>
|
||
<span style="flex:1"></span>
|
||
<button id="prevBtn">◀ 上一步</button>
|
||
<button id="nextBtn">下一步 ▶</button>
|
||
<button id="jumpBtn">⏭ 跳到结果</button>
|
||
<button id="autoBtn">自动播放</button>
|
||
<button id="resetBtn">重置</button>
|
||
</div>
|
||
|
||
<!-- 步骤流水线 -->
|
||
<div class="pipeline" id="pipeline"></div>
|
||
|
||
<!-- 提示条 -->
|
||
<div class="hint info" id="hintBox">
|
||
<span id="stepInfo"></span><br>
|
||
<span id="hintText"></span>
|
||
</div>
|
||
|
||
<!-- 可视化面板 -->
|
||
<div class="panels">
|
||
<div class="panel" id="mainPanel">
|
||
<h3>📊 可视化</h3>
|
||
<div class="vis-area" id="vizArea">点击「生成图解」开始</div>
|
||
</div>
|
||
<div class="panel-grid">
|
||
<div class="panel" id="detailPanel">
|
||
<h3>📝 当前步骤详情</h3>
|
||
<div id="detailContent">等待开始...</div>
|
||
</div>
|
||
<div class="panel" id="resultPanel">
|
||
<h3>✅ 结果</h3>
|
||
<div id="resultContent">等待完成...</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
<!-- 代码 -->
|
||
<div class="panel code-section">
|
||
<h3>💻 参考代码（Python）</h3>
|
||
<div id="codeArea"></div>
|
||
</div>
|
||
|
||
<footer>Powered by QwenPaw · 图解算法 · LeetCode Hot 100</footer>
|
||
</div>
|
||
|
||
<script src="../shared/algo-viz.js"></script>
|
||
<script>
|
||
"use strict";
|
||
(function() {
|
||
// ========== Algorithm Logic ==========
|
||
|
||
const examples = [
|
||
{board: [["A","B","C","E"],["S","F","C","S"],["A","D","E","E"]], word: "ABCCED", label: '示例1: ABCCED'},
|
||
{board: [["A","B","C","E"],["S","F","C","S"],["A","D","E","E"]], word: "SEE", label: '示例2: SEE'},
|
||
{board: [["A","B","C","E"],["S","F","C","S"],["A","D","E","E"]], word: "ABCB", label: '示例3: ABCB(不存在)'},
|
||
];
|
||
let board, word, R, C, steps, stepCtrl;
|
||
|
||
function buildSteps(b, w) {
|
||
board = b.map(r=>[...r]); R = board.length; C = board[0].length; word = w;
|
||
steps = [];
|
||
let found = false;
|
||
|
||
steps.push({stage:'start', msg:`在网格中搜索单词 "${word}"`, hl:{}, path:[], charIdx:0, found:false});
|
||
|
||
function dfs(r, c, idx, path, visited) {
|
||
if (idx === word.length) {
|
||
found = true;
|
||
steps.push({stage:'found', msg:`找到单词 "${word}"！`, hl:{}, path:[...path], charIdx:idx, found:true});
|
||
return true;
|
||
}
|
||
if (r<0||r>=R||c<0||c>=C||visited.has(r+','+c)||board[r][c]!==word[idx]) {
|
||
if (r>=0&&r<R&&c>=0&&c<C&&board[r][c]!==word[idx])
|
||
steps.push({stage:'mismatch', msg:`(${r},${c})='${board[r][c]}' ≠ '${word[idx]}'，跳过`, hl:{[r+','+c]:'wall'}, path:[...path], charIdx:idx, found:false});
|
||
return false;
|
||
}
|
||
|
||
visited.add(r+','+c);
|
||
path.push(r+','+c);
|
||
const hl = {}; hl[r+','+c] = 'current';
|
||
// show visited cells
|
||
visited.forEach(k => { if(k!==r+','+c) hl[k]='visited'; });
|
||
steps.push({stage:'match', msg:`(${r},${c})='${board[r][c]}' = '${word[idx]}' 匹配 ✓ (第${idx+1}/${word.length}个)`, hl, path:[...path], charIdx:idx+1, found:false});
|
||
|
||
const dirs = [[0,1],[0,-1],[1,0],[-1,0]];
|
||
for (const [dr,dc] of dirs) {
|
||
if (dfs(r+dr, c+dc, idx+1, path, visited)) return true;
|
||
}
|
||
|
||
visited.delete(r+','+c);
|
||
path.pop();
|
||
steps.push({stage:'backtrack', msg:`从 (${r},${c}) 回溯`, hl:{}, path:[...path], charIdx:idx, found:false});
|
||
return false;
|
||
}
|
||
|
||
for (let r=0; r<R && !found; r++) {
|
||
for (let c=0; c<C && !found; c++) {
|
||
if (board[r][c] === word[0]) {
|
||
const hl = {}; hl[r+','+c] = 'current';
|
||
steps.push({stage:'start_pos', msg:`找到起始点 (${r},${c})='${word[0]}'`, hl, path:[], charIdx:0, found:false});
|
||
const path = [];
|
||
const visited = new Set();
|
||
dfs(r, c, 0, path, visited);
|
||
}
|
||
}
|
||
}
|
||
if (!found) steps.push({stage:'not_found', msg:`未找到单词 "${word}"`, hl:{}, path:[], charIdx:-1, found:false});
|
||
}
|
||
|
||
function render(step) {
|
||
const s = steps[step];
|
||
const cellStyle = (val,r,c) => {
|
||
const key = r+','+c;
|
||
if (s.hl[key]==='current') return 'background:#fef3c7;border-color:var(--orange);box-shadow:0 0 0 3px rgba(245,158,11,0.3);color:#92400e;font-weight:700;';
|
||
if (s.hl[key]==='visited') return 'background:#dcfce7;border-color:var(--green);color:#166534;';
|
||
if (s.hl[key]==='wall') return 'background:#fee2e2;color:#991b1b;';
|
||
return 'background:white;color:var(--text);';
|
||
};
|
||
let viz = renderGrid(board, {highlights:s.hl, cellSize:48, cellStyle});
|
||
viz += `<div style="margin-top:8px;"><b>搜索词：</b>`;
|
||
for (let i=0; i<word.length; i++) {
|
||
const matched = i < s.charIdx;
|
||
viz += `<span style="font-weight:700;font-size:16px;color:${matched?'var(--green)':'var(--text-muted)'};${i===s.charIdx?'text-decoration:underline;':''}">${word[i]}</span>`;
|
||
}
|
||
viz += '</div>';
|
||
if (s.path.length > 0) viz += `<div style="margin-top:4px;">路径: ${s.path.map(p=>'('+p+')').join(' → ')}</div>`;
|
||
$('vizArea').innerHTML = viz;
|
||
$('detailContent').innerHTML = '<div class="calc-block">' + s.msg + '</div>';
|
||
if (s.stage==='found') $('resultContent').innerHTML = `<div class="final-answer">返回 <b>True</b>，路径: ${s.path.map(p=>'('+p+')').join('→')}</div>`;
|
||
if (s.stage==='not_found') $('resultContent').innerHTML = '<div class="final-answer" style="border-color:#f87171;background:#fef2f2;">返回 <b>False</b></div>';
|
||
$('hintText').textContent = s.msg;
|
||
const stages = ['start→开始','start_pos→起始点','match→匹配','mismatch→不匹配','backtrack→回溯','found→找到','not_found→未找到'];
|
||
$('pipeline').innerHTML = stages.map(st => { const [k,l]=st.split('→'); return `<span class="pipe-step ${s.stage===k?'active':''}">${l}</span>`; }).join('<i>→</i>');
|
||
}
|
||
|
||
function init() {
|
||
const sel = $('exampleSelect');
|
||
examples.forEach((e,i) => { sel.innerHTML += `<option value="${i}">${e.label}</option>`; });
|
||
$('inputArea').value = 'ABCCED';
|
||
buildSteps(examples[0].board, examples[0].word);
|
||
stepCtrl = new StepController({onStep: render});
|
||
stepCtrl.setSteps(steps.map((_,i)=>i));
|
||
$('stepInfo').textContent = '步骤 1 / ' + steps.length;
|
||
stepCtrl.onStep = (idx) => { render(idx); $('stepInfo').textContent = `步骤 ${idx+1} / ${steps.length}`; };
|
||
$('applyBtn').onclick = () => {
|
||
buildSteps(examples[0].board, $('inputArea').value.trim());
|
||
stepCtrl.setSteps(steps.map((_,i)=>i)); render(0); $('stepInfo').textContent = '步骤 1 / ' + steps.length;
|
||
};
|
||
$('exampleSelect').onchange = () => {
|
||
const e = examples[parseInt($('exampleSelect').value)];
|
||
buildSteps(e.board, e.word); stepCtrl.setSteps(steps.map((_,i)=>i)); render(0);
|
||
};
|
||
$('prevBtn').onclick = () => stepCtrl.prev();
|
||
$('nextBtn').onclick = () => stepCtrl.next();
|
||
$('jumpBtn').onclick = () => stepCtrl.jumpToEnd();
|
||
$('autoBtn').onclick = () => { const on = stepCtrl.toggleAuto(); $('autoBtn').textContent = on ? '暂停' : '自动播放'; };
|
||
$('resetBtn').onclick = () => { stepCtrl.reset(); $('autoBtn').textContent = '自动播放'; };
|
||
}
|
||
init();
|
||
$('codeArea').innerHTML = renderCode(`def exist(board, word):
|
||
rows, cols = len(board), len(board[0])
|
||
def dfs(r, c, idx, visited):
|
||
if idx == len(word):
|
||
return True
|
||
if (r<0 or r>=rows or c<0 or c>=cols
|
||
or (r,c) in visited or board[r][c]!=word[idx]):
|
||
return False
|
||
visited.add((r, c))
|
||
for dr, dc in [(0,1),(0,-1),(1,0),(-1,0)]:
|
||
if dfs(r+dr, c+dc, idx+1, visited):
|
||
return True
|
||
visited.remove((r, c))
|
||
return False
|
||
for r in range(rows):
|
||
for c in range(cols):
|
||
if dfs(r, c, 0, set()):
|
||
return True
|
||
return False`, {lang:'Python'});
|
||
|
||
})();
|
||
</script>
|
||
</body>
|
||
</html> |