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138 lines
3.2 KiB
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138 lines
3.2 KiB
HTML
<p>给你两个 <strong>正整数 </strong><code>n</code> 和 <code>k</code>。有 <code>n</code> 个编号从 <code>0</code> 到 <code>n - 1</code> 的孩子按顺序从左到右站成一队。</p>
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<p>最初，编号为 0 的孩子拿着一个球，并且向右传球。每过一秒，拿着球的孩子就会将球传给他旁边的孩子。一旦球到达队列的 <strong>任一端 </strong>，即编号为 0 的孩子或编号为 <code>n - 1</code> 的孩子处，传球方向就会<strong> 反转 </strong>。</p>
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<p>返回 <code>k</code> 秒后接到球的孩子的编号。</p>
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<p> </p>
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<p><strong class="example">示例 1：</strong></p>
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<div class="example-block">
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<p><strong>输入：</strong><span class="example-io">n = 3, k = 5</span></p>
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<p><strong>输出：</strong><span class="example-io">1</span></p>
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<p><strong>解释：</strong></p>
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<table>
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<tbody>
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<tr>
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<th>经过的时间</th>
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<th>孩子队列</th>
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</tr>
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<tr>
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<td><code>0</code></td>
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<td><code>[<u>0</u>, 1, 2]</code></td>
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</tr>
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<tr>
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<td><code>1</code></td>
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<td><code>[0, <u>1</u>, 2]</code></td>
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</tr>
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<tr>
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<td><code>2</code></td>
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<td><code>[0, 1, <u>2</u>]</code></td>
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</tr>
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<tr>
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<td><code>3</code></td>
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<td><code>[0, <u>1</u>, 2]</code></td>
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</tr>
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<tr>
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<td><code>4</code></td>
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<td><code>[<u>0</u>, 1, 2]</code></td>
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</tr>
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<tr>
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<td><code>5</code></td>
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<td><code>[0, <u>1</u>, 2]</code></td>
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</tr>
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</tbody>
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</table>
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</div>
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<p><strong class="example">示例 2：</strong></p>
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<div class="example-block">
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<p><strong>输入：</strong><span class="example-io">n = 5, k = 6</span></p>
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<p><strong>输出：</strong><span class="example-io">2</span></p>
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<p><strong>解释：</strong></p>
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<table>
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<tbody>
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<tr>
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<th>经过的时间</th>
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<th>孩子队列</th>
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</tr>
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<tr>
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<td><code>0</code></td>
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<td><code>[<u>0</u>, 1, 2, 3, 4]</code></td>
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</tr>
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<tr>
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<td><code>1</code></td>
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<td><code>[0, <u>1</u>, 2, 3, 4]</code></td>
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</tr>
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<tr>
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<td><code>2</code></td>
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<td><code>[0, 1, <u>2</u>, 3, 4]</code></td>
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</tr>
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<tr>
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<td><code>3</code></td>
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<td><code>[0, 1, 2, <u>3</u>, 4]</code></td>
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</tr>
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<tr>
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<td><code>4</code></td>
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<td><code>[0, 1, 2, 3, <u>4</u>]</code></td>
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</tr>
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<tr>
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<td><code>5</code></td>
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<td><code>[0, 1, 2, <u>3</u>, 4]</code></td>
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</tr>
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<tr>
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<td><code>6</code></td>
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<td><code>[0, 1, <u>2</u>, 3, 4]</code></td>
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</tr>
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</tbody>
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</table>
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</div>
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<p><strong class="example">示例 3：</strong></p>
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<div class="example-block">
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<p><strong>输入：</strong><span class="example-io">n = 4, k = 2</span></p>
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<p><strong>输出：</strong><span class="example-io">2</span></p>
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<p><strong>解释：</strong></p>
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<table>
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<tbody>
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<tr>
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<th>经过的时间</th>
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<th>孩子队列</th>
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</tr>
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<tr>
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<td><code>0</code></td>
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<td><code>[<u>0</u>, 1, 2, 3]</code></td>
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</tr>
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<tr>
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<td><code>1</code></td>
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<td><code>[0, <u>1</u>, 2, 3]</code></td>
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</tr>
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<tr>
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<td><code>2</code></td>
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<td><code>[0, 1, <u>2</u>, 3]</code></td>
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</tr>
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</tbody>
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</table>
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</div>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>2 <= n <= 50</code></li>
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<li><code>1 <= k <= 50</code></li>
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</ul>
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