Submission #868005

#TimeUsernameProblemLanguageResultExecution timeMemory
868005TAhmed33Boarding Passes (BOI22_passes)C++98
5 / 100
3 ms604 KiB
#include <bits/stdc++.h>
using namespace std;
typedef long double ld;
int main () {
	string s; cin >> s; int n = s.length();
	ld ans = 0;
	for (int i = 2; i < n; i++) {
		ans += min(0.5 * (i - 1), 0.5 * (n - i));
	}
	cout << fixed << setprecision(3) << ans << '\n';
}
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