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51 lines
2.4 KiB
HTML
51 lines
2.4 KiB
HTML
<p>You are given a string <code>s</code>, a string <code>chars</code> of <strong>distinct</strong> characters and an integer array <code>vals</code> of the same length as <code>chars</code>.</p>
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<p>The <strong>cost of the substring </strong>is the sum of the values of each character in the substring. The cost of an empty string is considered <code>0</code>.</p>
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<p>The <strong>value of the character </strong>is defined in the following way:</p>
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<ul>
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<li>If the character is not in the string <code>chars</code>, then its value is its corresponding position <strong>(1-indexed)</strong> in the alphabet.
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<ul>
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<li>For example, the value of <code>'a'</code> is <code>1</code>, the value of <code>'b'</code> is <code>2</code>, and so on. The value of <code>'z'</code> is <code>26</code>.</li>
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</ul>
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</li>
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<li>Otherwise, assuming <code>i</code> is the index where the character occurs in the string <code>chars</code>, then its value is <code>vals[i]</code>.</li>
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</ul>
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<p>Return <em>the maximum cost among all substrings of the string</em> <code>s</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> s = "adaa", chars = "d", vals = [-1000]
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<strong>Output:</strong> 2
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<strong>Explanation:</strong> The value of the characters "a" and "d" is 1 and -1000 respectively.
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The substring with the maximum cost is "aa" and its cost is 1 + 1 = 2.
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It can be proven that 2 is the maximum cost.
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</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> s = "abc", chars = "abc", vals = [-1,-1,-1]
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<strong>Output:</strong> 0
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<strong>Explanation:</strong> The value of the characters "a", "b" and "c" is -1, -1, and -1 respectively.
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The substring with the maximum cost is the empty substring "" and its cost is 0.
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It can be proven that 0 is the maximum cost.
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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>1 <= s.length <= 10<sup>5</sup></code></li>
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<li><code>s</code> consist of lowercase English letters.</li>
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<li><code>1 <= chars.length <= 26</code></li>
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<li><code>chars</code> consist of <strong>distinct</strong> lowercase English letters.</li>
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<li><code>vals.length == chars.length</code></li>
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<li><code>-1000 <= vals[i] <= 1000</code></li>
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</ul>
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