제출 #625280

#제출 시각아이디문제언어결과실행 시간메모리
625280Ooops_sorryBoarding Passes (BOI22_passes)C++14
0 / 100
0 ms212 KiB
#include<bits/stdc++.h> using namespace std; mt19937 rnd(51); #define ll long long #define pb push_back #define ld long double const ld INF = 1e18; //a * (a - 1) / 4 signed main() { #ifdef LOCAL freopen("input.txt", "r", stdin); #endif // LOCAL ios_base::sync_with_stdio(0); cin.tie(0); string s; cin >> s; int n = s.size(); ld mn = INF; for (int i = 1; i < n; i++) { mn = min(mn, ((ld)i * (i - 1) + (ld)(n - i) * (n - i - 1)) / 4); } cout << setprecision(30) << fixed << mn << endl; return 0; }
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