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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>052. 腐烂的橘子 – 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>🟡 052. 腐烂的橘子 <span class="badge medium">中等</span></h1>
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<p class="subtitle">分类：图论 ｜ 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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{grid: [[2,1,1],[1,1,0],[0,1,1]], label: '示例1: 3×3'},
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{grid: [[2,1,1],[0,1,1],[1,0,1]], label: '示例2: 有不可达'},
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{grid: [[0,2]], label: '示例3: 无橘子'},
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];
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let grid, R, C, steps, stepCtrl;
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function buildSteps(g) {
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grid = g.map(r=>[...r]); R = grid.length; C = grid[0].length;
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steps = [];
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const queue = [];
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let fresh = 0;
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for (let r=0; r<R; r++) for (let c=0; c<C; c++) {
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if (grid[r][c]===2) queue.push([r,c]);
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else if (grid[r][c]===1) fresh++;
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}
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steps.push({stage:'init', msg:`BFS多源最短路径：${queue.length}个腐烂源，${fresh}个新鲜橘子`, grid:grid.map(r=>[...r]), minutes:0, fresh});
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if (fresh === 0) { steps.push({stage:'done', msg:'没有新鲜橘子，返回0', grid:grid.map(r=>[...r]), minutes:0, fresh:0}); return; }
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let minutes = 0;
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const dirs = [[0,1],[0,-1],[1,0],[-1,0]];
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while (queue.length > 0 && fresh > 0) {
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const size = queue.length;
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const newlyRotten = [];
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for (let i=0; i<size; i++) {
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const [r,c] = queue.shift();
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for (const [dr,dc] of dirs) {
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const nr=r+dr, nc=c+dc;
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if (nr>=0 && nr<R && nc>=0 && nc<C && grid[nr][nc]===1) {
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grid[nr][nc] = 2;
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fresh--;
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queue.push([nr,nc]);
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newlyRotten.push([nr,nc]);
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}
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}
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}
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if (newlyRotten.length > 0) {
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minutes++;
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steps.push({stage:'rot', msg:`第 ${minutes} 分钟：${newlyRotten.length}个橘子腐烂 (剩余${fresh}个新鲜)`, grid:grid.map(r=>[...r]), minutes, fresh, newlyRotten});
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}
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}
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if (fresh > 0) steps.push({stage:'impossible', msg:`仍有${fresh}个新鲜橘子无法腐烂`, grid:grid.map(r=>[...r]), minutes, fresh});
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else steps.push({stage:'done', msg:`所有橘子腐烂，用时 ${minutes} 分钟`, grid:grid.map(r=>[...r]), minutes, fresh:0});
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}
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function render(step) {
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const s = steps[step];
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const hl = {};
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if (s.newlyRotten) s.newlyRotten.forEach(([r,c]) => { hl[r+','+c] = 'current'; });
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const cellStyle = (val,r,c) => {
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const key = r+','+c;
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if (hl[key]) return 'background:#fbbf24;color:#78350f;box-shadow:0 0 0 3px rgba(245,158,11,0.4);';
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if (val===2) return 'background:#fed7aa;color:#9a3412;';
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if (val===1) return 'background:#dcfce7;color:#166534;';
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return 'background:#f1f5f9;color:#94a3b8;';
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};
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let viz = renderGrid(s.grid, {highlights:hl, cellSize:52, cellStyle});
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viz += '<div style="margin-top:8px;display:flex;gap:16px;">';
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viz += '<span style="color:#9a3412;">🟠 腐烂</span>';
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viz += '<span style="color:#166534;">🟢 新鲜</span>';
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viz += '<span style="color:#94a3b8;">⬜ 空</span>';
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viz += `<span style="color:var(--blue);">⏱ 分钟=${s.minutes}</span>`;
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viz += '</div>';
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$('vizArea').innerHTML = viz;
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$('detailContent').innerHTML = '<div class="calc-block">' + s.msg + '</div>';
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if (s.stage==='done') $('resultContent').innerHTML = `<div class="final-answer">经过 <b>${s.minutes}</b> 分钟，所有橘子腐烂</div>`;
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if (s.stage==='impossible') $('resultContent').innerHTML = `<div class="final-answer" style="border-color:#f87171;background:#fef2f2;">返回 <b>-1</b>（有新鲜橘子无法腐烂）</div>`;
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$('hintText').textContent = s.msg;
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const stages = ['init→初始化','rot→腐烂传播','done→完成','impossible→不可能'];
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$('pipeline').innerHTML = stages.map(st => { const [k,l]=st.split('→'); return `<span class="pipe-step ${s.stage===k?'active':''}">${l}</span>`; }).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 = '[[2,1,1],[1,1,0],[0,1,1]]';
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buildSteps(examples[0].grid);
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stepCtrl = new StepController({onStep: render, autoInterval:800});
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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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try { const g = JSON.parse($('inputArea').value); buildSteps(g); stepCtrl.setSteps(steps.map((_,i)=>i)); render(0); $('stepInfo').textContent = '步骤 1 / ' + steps.length; }
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catch(e) { alert('请输入合法 JSON 二维数组'); }
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};
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$('exampleSelect').onchange = () => {
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const e = examples[parseInt($('exampleSelect').value)];
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buildSteps(e.grid); stepCtrl.setSteps(steps.map((_,i)=>i)); render(0);
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};
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$('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 orangesRotting(grid):
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rows, cols = len(grid), len(grid[0])
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queue = deque()
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fresh = 0
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for r in range(rows):
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for c in range(cols):
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if grid[r][c] == 2:
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queue.append((r, c))
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elif grid[r][c] == 1:
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fresh += 1
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minutes = 0
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while queue and fresh > 0:
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for _ in range(len(queue)):
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r, c = queue.popleft()
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for dr, dc in [(0,1),(0,-1),(1,0),(-1,0)]:
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nr, nc = r+dr, c+dc
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if 0<=nr<rows and 0<=nc<cols and grid[nr][nc]==1:
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grid[nr][nc] = 2
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fresh -= 1
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queue.append((nr, nc))
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minutes += 1
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return minutes if fresh == 0 else -1`, {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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