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34 lines
1.7 KiB
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34 lines
1.7 KiB
HTML
<p>You are given an array of strings <code>equations</code> that represent relationships between variables where each string <code>equations[i]</code> is of length <code>4</code> and takes one of two different forms: <code>"x<sub>i</sub>==y<sub>i</sub>"</code> or <code>"x<sub>i</sub>!=y<sub>i</sub>"</code>.Here, <code>x<sub>i</sub></code> and <code>y<sub>i</sub></code> are lowercase letters (not necessarily different) that represent one-letter variable names.</p>
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<p>Return <code>true</code><em> if it is possible to assign integers to variable names so as to satisfy all the given equations, or </em><code>false</code><em> otherwise</em>.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> equations = ["a==b","b!=a"]
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<strong>Output:</strong> false
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<strong>Explanation:</strong> If we assign say, a = 1 and b = 1, then the first equation is satisfied, but not the second.
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There is no way to assign the variables to satisfy both equations.
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</pre>
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<p><strong>Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> equations = ["b==a","a==b"]
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<strong>Output:</strong> true
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<strong>Explanation:</strong> We could assign a = 1 and b = 1 to satisfy both equations.
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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 <= equations.length <= 500</code></li>
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<li><code>equations[i].length == 4</code></li>
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<li><code>equations[i][0]</code> is a lowercase letter.</li>
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<li><code>equations[i][1]</code> is either <code>'='</code> or <code>'!'</code>.</li>
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<li><code>equations[i][2]</code> is <code>'='</code>.</li>
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<li><code>equations[i][3]</code> is a lowercase letter.</li>
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</ul>
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