19 lines
506 B
C#
19 lines
506 B
C#
public class Solution {
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private static int GetMask(string allowed) {
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var mask = 0;
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foreach (var c in allowed) {
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mask |= 1 << (c - 'a');
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}
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return mask;
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}
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private static bool IsConsistent(int mask, string word)
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=> word.All(c => (mask & (1 << (c - 'a'))) != 0);
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public int CountConsistentStrings(string allowed, string[] words) {
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var mask = GetMask(allowed);
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return words.Count(word => IsConsistent(mask, word));
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}
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}
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