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55 lines
2.3 KiB
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55 lines
2.3 KiB
HTML
<p>You are given a <strong>0-indexed</strong> array <code>nums</code> of <code>n</code> integers and an integer <code>target</code>.</p>
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<p>You are initially positioned at index <code>0</code>. In one step, you can jump from index <code>i</code> to any index <code>j</code> such that:</p>
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<ul>
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<li><code>0 <= i < j < n</code></li>
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<li><code>-target <= nums[j] - nums[i] <= target</code></li>
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</ul>
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<p>Return <em>the <strong>maximum number of jumps</strong> you can make to reach index</em> <code>n - 1</code>.</p>
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<p>If there is no way to reach index <code>n - 1</code>, return <code>-1</code>.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> nums = [1,3,6,4,1,2], target = 2
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<strong>Output:</strong> 3
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<strong>Explanation:</strong> To go from index 0 to index n - 1 with the maximum number of jumps, you can perform the following jumping sequence:
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- Jump from index 0 to index 1.
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- Jump from index 1 to index 3.
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- Jump from index 3 to index 5.
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It can be proven that there is no other jumping sequence that goes from 0 to n - 1 with more than 3 jumps. Hence, the answer is 3. </pre>
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<p><strong class="example">Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> nums = [1,3,6,4,1,2], target = 3
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<strong>Output:</strong> 5
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<strong>Explanation:</strong> To go from index 0 to index n - 1 with the maximum number of jumps, you can perform the following jumping sequence:
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- Jump from index 0 to index 1.
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- Jump from index 1 to index 2.
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- Jump from index 2 to index 3.
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- Jump from index 3 to index 4.
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- Jump from index 4 to index 5.
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It can be proven that there is no other jumping sequence that goes from 0 to n - 1 with more than 5 jumps. Hence, the answer is 5. </pre>
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<p><strong class="example">Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> nums = [1,3,6,4,1,2], target = 0
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<strong>Output:</strong> -1
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<strong>Explanation:</strong> It can be proven that there is no jumping sequence that goes from 0 to n - 1. Hence, the answer is -1.
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>2 <= nums.length == n <= 1000</code></li>
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<li><code>-10<sup>9</sup> <= nums[i] <= 10<sup>9</sup></code></li>
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<li><code>0 <= target <= 2 * 10<sup>9</sup></code></li>
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</ul>
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