제출 #722334

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
722334		HamletPetrosyan	Boarding Passes (BOI22_passes)	C++17	5 / 100	1 ms	468 KiB

passes

/// -- -- ---- --- -- --
/// 11.04.2023 Tue 22:40
/// -- -- ---- --- -- --

#include <bits/stdc++.h>
using namespace std;
void abandoned_precalc();

#define pll pair<long long, long long>
#define all(a) (a).begin(), (a).end()
#define len(a) ((long long)(a).size())
#define add push_back
#define mkp make_pair
#define ll long long
#define fr first
#define sc second

const long long INF = 1000000000ll * 1000000003ll;
const long long MOD = 1000000007ll;
const int N = 2e5 + 5;

string s;
ll ans4 = INF;

void solve(){
	cin >> s;
	for(ll i = 0; i <= len(s); i++){
		ans4 = min(ans4, i * (i - 1) + (len(s) - i) * (len(s) - i - 1));
	}
	cout << (double)ans4 / 4. << "\n";
}

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);
	int _ = 1;
	cout << fixed;
	cout.precision(9);

	abandoned_precalc();
	// cin >> _ ;
	while(_--) solve();
	return 0;
}

/// ---- - --------  ------ -------- -- - - -
/// just a reminder. ubuntu password is i o i
/// ---- - --------  ------ -------- -- - - -














void abandoned_precalc(){
	
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 25
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40