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52 lines
1.6 KiB
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52 lines
1.6 KiB
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<p>给你一个下标从 0 开始的整数数组 <code>nums</code> ，返回 <code>nums</code> 中满足<em> </em><code>i mod 10 == nums[i]</code><em> </em>的最小下标 <code>i</code> ；如果不存在这样的下标，返回<em> </em><code>-1</code><em> </em>。</p>
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<p><code>x mod y</code> 表示 <code>x</code> 除以 <code>y</code> 的 <strong>余数</strong> 。</p>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre><strong>输入：</strong>nums = [0,1,2]
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<strong>输出：</strong>0
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<strong>解释：</strong>
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i=0: 0 mod 10 = 0 == nums[0].
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i=1: 1 mod 10 = 1 == nums[1].
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i=2: 2 mod 10 = 2 == nums[2].
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所有下标都满足 i mod 10 == nums[i] ，所以返回最小下标 0
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</pre>
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<p><strong>示例 2：</strong></p>
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<pre><strong>输入：</strong>nums = [4,3,2,1]
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<strong>输出：</strong>2
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<strong>解释：</strong>
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i=0: 0 mod 10 = 0 != nums[0].
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i=1: 1 mod 10 = 1 != nums[1].
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i=2: 2 mod 10 = 2 == nums[2].
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i=3: 3 mod 10 = 3 != nums[3].
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2 唯一一个满足 i mod 10 == nums[i] 的下标
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</pre>
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<p><strong>示例 3：</strong></p>
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<pre><strong>输入：</strong>nums = [1,2,3,4,5,6,7,8,9,0]
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<strong>输出：</strong>-1
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<strong>解释：</strong>不存在满足 i mod 10 == nums[i] 的下标
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</pre>
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<p><strong>示例 4：</strong></p>
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<pre><strong>输入：</strong>nums = [2,1,3,5,2]
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<strong>输出：</strong>1
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<strong>解释：</strong>1 是唯一一个满足 i mod 10 == nums[i] 的下标
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</pre>
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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>1 <= nums.length <= 100</code></li>
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<li><code>0 <= nums[i] <= 9</code></li>
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</ul>
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