Create README - LeetHub

Author: Sangram03

3639-zero-array-transformation-i/README.md

@@ -0,0 +1,70 @@
+<h2><a href="https://leetcode.com/problems/zero-array-transformation-i">3639. Zero Array Transformation I</a></h2><h3>Medium</h3><hr><p>You are given an integer array <code>nums</code> of length <code>n</code> and a 2D array <code>queries</code>, where <code>queries[i] = [l<sub>i</sub>, r<sub>i</sub>]</code>.</p>
+
+<p>For each <code>queries[i]</code>:</p>
+
+<ul>
+	<li>Select a <span data-keyword="subset">subset</span> of indices within the range <code>[l<sub>i</sub>, r<sub>i</sub>]</code> in <code>nums</code>.</li>
+	<li>Decrement the values at the selected indices by 1.</li>
+</ul>
+
+<p>A <strong>Zero Array</strong> is an array where all elements are equal to 0.</p>
+
+<p>Return <code>true</code> if it is <em>possible</em> to transform <code>nums</code> into a <strong>Zero Array </strong>after processing all the queries sequentially, otherwise return <code>false</code>.</p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<div class="example-block">
+<p><strong>Input:</strong> <span class="example-io">nums = [1,0,1], queries = [[0,2]]</span></p>
+
+<p><strong>Output:</strong> <span class="example-io">true</span></p>
+
+<p><strong>Explanation:</strong></p>
+
+<ul>
+	<li><strong>For i = 0:</strong>
+
+	<ul>
+		<li>Select the subset of indices as <code>[0, 2]</code> and decrement the values at these indices by 1.</li>
+		<li>The array will become <code>[0, 0, 0]</code>, which is a Zero Array.</li>
+	</ul>
+	</li>
+</ul>
+</div>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<div class="example-block">
+<p><strong>Input:</strong> <span class="example-io">nums = [4,3,2,1], queries = [[1,3],[0,2]]</span></p>
+
+<p><strong>Output:</strong> <span class="example-io">false</span></p>
+
+<p><strong>Explanation:</strong></p>
+
+<ul>
+	<li><strong>For i = 0:</strong>
+
+	<ul>
+		<li>Select the subset of indices as <code>[1, 2, 3]</code> and decrement the values at these indices by 1.</li>
+		<li>The array will become <code>[4, 2, 1, 0]</code>.</li>
+	</ul>
+	</li>
+	<li><strong>For i = 1:</strong>
+	<ul>
+		<li>Select the subset of indices as <code>[0, 1, 2]</code> and decrement the values at these indices by 1.</li>
+		<li>The array will become <code>[3, 1, 0, 0]</code>, which is not a Zero Array.</li>
+	</ul>
+	</li>
+</ul>
+</div>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= nums.length &lt;= 10<sup>5</sup></code></li>
+	<li><code>0 &lt;= nums[i] &lt;= 10<sup>5</sup></code></li>
+	<li><code>1 &lt;= queries.length &lt;= 10<sup>5</sup></code></li>
+	<li><code>queries[i].length == 2</code></li>
+	<li><code>0 &lt;= l<sub>i</sub> &lt;= r<sub>i</sub> &lt; nums.length</code></li>
+</ul>