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57 lines
2.1 KiB
HTML
57 lines
2.1 KiB
HTML
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<p>You are given a <strong>binary</strong> string <code>s</code> and an integer <code>k</code>.</p>
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<p>A <strong>binary string</strong> satisfies the <strong>k-constraint</strong> if <strong>either</strong> of the following conditions holds:</p>
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<ul>
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<li>The number of <code>0</code>'s in the string is at most <code>k</code>.</li>
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<li>The number of <code>1</code>'s in the string is at most <code>k</code>.</li>
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</ul>
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<p>Return an integer denoting the number of <span data-keyword="substring-nonempty">substrings</span> of <code>s</code> that satisfy the <strong>k-constraint</strong>.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">s = "10101", k = 1</span></p>
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<p><strong>Output:</strong> <span class="example-io">12</span></p>
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<p><strong>Explanation:</strong></p>
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<p>Every substring of <code>s</code> except the substrings <code>"1010"</code>, <code>"10101"</code>, and <code>"0101"</code> satisfies the k-constraint.</p>
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</div>
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<p><strong class="example">Example 2:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">s = "1010101", k = 2</span></p>
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<p><strong>Output:</strong> <span class="example-io">25</span></p>
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<p><strong>Explanation:</strong></p>
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<p>Every substring of <code>s</code> except the substrings with a length greater than 5 satisfies the k-constraint.</p>
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</div>
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<p><strong class="example">Example 3:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">s = "11111", k = 1</span></p>
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<p><strong>Output:</strong> <span class="example-io">15</span></p>
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<p><strong>Explanation:</strong></p>
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<p>All substrings of <code>s</code> satisfy the k-constraint.</p>
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</div>
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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>1 <= s.length <= 50 </code></li>
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<li><code>1 <= k <= s.length</code></li>
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<li><code>s[i]</code> is either <code>'0'</code> or <code>'1'</code>.</li>
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</ul>
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