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leetcode-cn/problem (English)/取整购买后的账户余额(English) [account-balance-after-rounded-purchase].html
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<p>Initially, you have a bank account balance of <code>100</code> dollars.</p>
<p>Initially, you have a bank account balance of <strong>100</strong> dollars.</p>
<p>You are given an integer <code>purchaseAmount</code> representing the amount you will spend on a purchase in dollars.</p>
<p>You are given an integer <code>purchaseAmount</code> representing the amount you will spend on a purchase in dollars, in other words, its price.</p>
<p>At the store where you will make the purchase, the purchase amount is rounded to the <strong>nearest multiple</strong> of <code>10</code>. In other words, you pay a <strong>non-negative</strong> amount, <code>roundedAmount</code>, such that <code>roundedAmount</code> is a multiple of <code>10</code> and <code>abs(roundedAmount - purchaseAmount)</code> is <strong>minimized</strong>.</p>
<p>When making the purchase, first the <code>purchaseAmount</code> <strong>is rounded to the nearest multiple of 10</strong>. Let us call this value <code>roundedAmount</code>. Then, <code>roundedAmount</code> dollars are removed from your bank account.</p>
<p>If there is more than one nearest multiple of <code>10</code>, the <strong>largest multiple</strong> is chosen.</p>
<p>Return an integer denoting your final bank account balance after this purchase.</p>
<p>Return <em>an integer denoting your account balance after making a purchase worth </em><code>purchaseAmount</code><em> dollars from the store.</em></p>
<p><strong>Notes:</strong></p>
<p><strong>Note:</strong> <code>0</code> is considered to be a multiple of <code>10</code> in this problem.</p>
<ul>
<li>0 is considered to be a multiple of 10 in this problem.</li>
<li>When rounding, 5 is rounded upward (5 is rounded to 10, 15 is rounded to 20, 25 to 30, and so on).</li>
</ul>
<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<pre>
<strong>Input:</strong> purchaseAmount = 9
<strong>Output:</strong> 90
<strong>Explanation:</strong> In this example, the nearest multiple of 10 to 9 is 10. Hence, your account balance becomes 100 - 10 = 90.
</pre>
<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">purchaseAmount = 9</span></p>
<p><strong>Output:</strong> <span class="example-io">90</span></p>
<p><strong>Explanation:</strong></p>
<p>The nearest multiple of 10 to 9 is 10. So your account balance becomes 100 - 10 = 90.</p>
</div>
<p><strong class="example">Example 2:</strong></p>
<pre>
<strong>Input:</strong> purchaseAmount = 15
<strong>Output:</strong> 80
<strong>Explanation:</strong> In this example, there are two nearest multiples of 10 to 15: 10 and 20. So, the larger multiple, 20, is chosen.
Hence, your account balance becomes 100 - 20 = 80.
</pre>
<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">purchaseAmount = 15</span></p>
<p><strong>Output:</strong> <span class="example-io">80</span></p>
<p><strong>Explanation:</strong></p>
<p>The nearest multiple of 10 to 15 is 20. So your account balance becomes 100 - 20 = 80.</p>
</div>
<p><strong class="example">Example 3:</strong></p>
<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">purchaseAmount = 10</span></p>
<p><strong>Output:</strong> <span class="example-io">90</span></p>
<p><strong>Explanation:</strong></p>
<p>10 is a multiple of 10 itself. So your account balance becomes 100 - 10 = 90.</p>
</div>
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>