제출 #865437

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
865437		vjudge1	Sure Bet (CEOI17_sure)	C++17	100 / 100	60 ms	2000 KiB

sure

//Bismillahir-Rahmanir-Rahim
#include <bits/stdc++.h>
         
using namespace std;
      
#define flash ios_base::sync_with_stdio(0),cin.tie(0)
#define pb push_back
#define ll long long
#define ld long double
#define dbg(x) cerr << #x << " = " << x << "\n";
#define ff first
#define ss second
 
 /*     
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma comment (linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
*/ 
 
const long long INF = 1e9 + 7;
const long long MOD = 1e9 + 7;
const int maxn = 1e5 + 10;

int n;
double a[maxn], b[maxn], ans, x, y, sz, ans2;

void press_F_() {
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> a[i] >> b[i];
		// a[i] = rand() % 1000 + 1;
		// b[i] = rand() % 1000 + 1;
	}
	sort(a + 1, a + n + 1);
	sort(b + 1, b + n + 1);
	reverse(a + 1, a + n + 1);
	reverse(b + 1, b + n + 1);
	int id1 = 0, id2 = 0;
	// return;
	if (n <= 1000) {
		x = 0;
		y = 0;
		for (int i = 0; i <= n; i++) {
			y = 0;
			x += a[i];
			for (int j = 0; j <= n; j++) {
				y += b[j];
				ans2 = max(ans2, min(x - i - j, y - i - j));
			}
		}
		printf("%.4lf",(double)ans2);
		return;
	}
	while(id1 < n || id2 < n) {
		if (min(x + a[id1 + 1] - (sz + 1), y - (sz + 1)) >= min(x - (sz + 1), y + b[id2 + 1] - (sz + 1)) && id1 + 1 <= n) {
			id1++;
			x += a[id1];
			sz++;
		} else {
			id2++;
			y += b[id2];
			sz++;
		}
		ans = max(ans, min(x - sz, y - sz));
	}
	
	printf("%.4lf",(double)ans);
	// cout << '\n';
	
} 

int main() {
    flash;
    srand(time(0));
    int T = 1;
    // cin >> T;
    for (int i = 1; i <= T; i++) {
        // cout << "Case" << " " << i << ':' << "\n";
        press_F_();
    }
    //Respa gold 2023-2024 InshAllah
    return 0;
}
/*
Maybe not today and tomorrow, but InshAllah one day I will reach expert
*/
// g++ -std=c++17 main.cpp
// ./a.out

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40