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21 lines
372 B
C++
21 lines
372 B
C++
#include <bits/stdc++.h>
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using namespace std;
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string work(string s) {
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if (s.find('1') == string::npos) {
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return "A";
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}
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if (s.find('0') == string::npos) {
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return "B";
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}
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return "C" + work(s.substr(0, s.size() / 2)) + work(s.substr(s.size() / 2));
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}
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int main() {
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string s;
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cin >> s;
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cout << work(s) << endl;
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return 0;
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}
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