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18 lines
300 B
Chapel
18 lines
300 B
Chapel
use IO;
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config const numChars = 4;
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var theBytes: bytes;
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stdin.read(theBytes);
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var indices: [0..<26] int = -numChars;
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for (char, idx) in zip(theBytes.these() - b"a"[0], 0..) do {
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indices[char] = idx;
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if + reduce (indices > idx - numChars) == numChars {
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writeln(idx + 1);
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break;
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}
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}
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