22 lines
452 B
C++
22 lines
452 B
C++
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#include <iostream>
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#include <string>
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#include <algorithm>
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using namespace std;
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int main(int argc, char* argv[])
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{
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string signal;
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cin >> signal;
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for (int i = 0; i < signal.size()-4; i++)
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{
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string segment = signal.substr(i,4);
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sort(segment.begin(), segment.end());
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if (segment.end() == std::unique(segment.begin(), segment.end()))
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{
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cout << i+4 << endl;
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break;
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}
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}
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}
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