문제
풀이
#include <algorithm>
#include <iostream>
#include <string>
using namespace std;
void solve(void) {
string s; cin >> s;
int mx = 0, cur = 0;
for (char c : s) {
cur = (c == 'a' ? cur+1 : 0);
mx = max(mx, cur);
}
cout << string(mx+1, 'a');
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
return 0;
}