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Submission #498355

# Submission time Handle Problem Language Result Execution time Memory
498355 2021-12-25T04:52:27 Z ergagan Sure Bet (CEOI17_sure) C++17
0 / 100
 1 ms 332 KB 
//я так много думал, что опять попал
#include <bits/stdc++.h>
#define all(x) x.begin(),x.end()
#define pb push_back
#define ppb pop_back
#define pf push_front
#define ppf pop_front
#define f first
#define s second
#define left(v) v + v
#define right(v) v + v + 1
#define ub upper_bound
#define lb lower_bound
#define pll pair<ll, ll>
#define gay natural

//17 SEVENTEEN
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

using namespace std;
typedef long long ll;

const long double Pi = acos(-1.0);
const ll dx[] = {0,0,1,-1};
const ll dy[] = {1,-1,0,0};
const ll N = (ll) 1e6 + 17;
const ll M = (ll) 5e3 + 69;
const ll inf = (ll) 1e14 + 3;
const ll mod = (ll) 1e9 + 7;
ll sq(ll x) { return x * x; }

ll zxc = 1;

double a[N], b[N];

void solve() {
    ll n;
    double ans = 0;
    cin >> n;
    for(ll i = 1; i <= n; i++) {
        cin >> a[i] >> b[i];
    }
    sort(a + 1, a + n + 1);
    sort(b + 1, b + n + 1);
    reverse(a + 1, a + n + 1);
    reverse(b + 1, b + n + 1);

    double sum = a[1], mus = b[1];
    ll i = 2, j = 2;
    double cnt = 2;
    ans = max(ans, min(a[1] - 2, b[1] - 2));
    while(i <= n || j <= n) {
        if((sum < mus && i <= n) || j > n)
            cnt++, sum += a[i], i++, ans = max(ans, min(sum - cnt, mus - cnt));
        else
            cnt++, sum += b[j], j++, ans = max(ans, min(sum - cnt, mus - cnt));
    }
    printf("%.4lf",(double)ans);
}

int main(/*Уверенно*/) {
ios_base::sync_with_stdio(0);
    cin.tie(0);
/*
	freopen(".in", "r", stdin);
	freopen(".out", "w", stdout);
*/
//    cin >> zxc;
    while(zxc--) {
        solve();
    }
  	return 0;
}
// さよならさ いかなくちゃ
/*
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⡀⠀⠀⠀⢀⣀⣠⣤⣼⣿⣿⣿⣿⣿⣿⣿⣅⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣴⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣯⣽⣢⢤⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⣿⣿⣿⣿⣿⣿⣿⠿⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣯⡍⠲⣄⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠉⠉⢩⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠋⢢⣈⠫⢄⠀⠀⠀⠀⠀⠀⢀⡄⠂⢄⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣸⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⣰⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⣽⣿⣿⣿⣿⣽⣿⣿⣿⣿⣷⡧⠀⠀⠀⠀⢀⠎⠀⠀⠀⢃⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣿⣿⣿⣿⣿⣿⣿⡟⠀⠀⠀⠀⣸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⣿⣟⣣⠀⠀⠀⡎⠀⠀⠀⠀⠀⡆⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣸⣿⣿⣿⣿⣿⣿⠏⠀⠀⠀⠀⢠⣿⣿⣿⣿⣿⣿⣿⣿⡋⣿⣿⣿⣿⣿⣿⣿⣿⣿⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡔⡄⠀⠁⠀⠀⠀⠀⠀⢰⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⣿⣿⣿⠿⠋⠁⠀⠀⠀⠀⠀⣼⣿⣿⣿⣿⣿⣿⣿⣿⡇⣯⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⡇⢰⠇⠀⠀⠀⠀⠀⡘⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠉⠉⠀⠀⠀⠀⠀⠀⠀⠀⣼⣼⣿⣿⠿⣿⣿⣿⡿⢹⣿⣿⣿⣿⣿⣿⡽⣯⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠎⠦⡀⠀⠀⠀⢀⠇⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⢢⣿⡇⣼⣧⣶⣿⣿⣿⠁⢸⢿⣿⣿⣿⣿⣿⣷⡘⣷⡹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠧⡙⠀⠑⢄⣀⠤⠂⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣸⣟⣼⣿⣿⣿⣿⣿⣿⠀⠀⢛⣿⣿⣿⣿⣿⡿⣿⡬⠿⣾⡻⣿⣿⣿⣿⣿⣿⣿⣿⣿⢯⣿⣿⣿⣿⣿⣻⡆⢰⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠂⠀⣿⢻⣿⣿⣿⣿⣿⣿⣿⡏⠉⠉⠻⢿⣿⣿⣿⣿⣜⢿⣮⡙⠷⣦⣉⠓⢿⣷⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠆⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠤⠤⠤⠤⣀⠀⠘⠀⠀⣿⢸⢿⣿⣿⣿⣿⣿⠘⢿⠈⠁⠐⠄⠙⢟⢿⣿⣿⣦⡵⣟⣶⣽⣿⣿⣿⣿⣿⣿⣿⣿⣯⣾⣿⣿⣿⣿⣼⣿⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢀⠎⠀⠀⠀⠀⠀⠀⠑⠆⠀⠀⣿⠀⣿⣿⣿⣿⣿⣿⣀⣬⣧⣖⣢⠄⠀⠀⠀⠈⠑⠈⠹⠿⠋⠘⣿⣿⣿⡆⣿⣿⣿⡏⡧⣿⣿⣿⣿⣿⣿⣿⣧⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠊⠀⠀⠀⠀⠀⠀⠀⠀⠈⢆⠀⢿⠀⢹⣿⣿⣿⣿⣿⣿⡿⠻⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⢮⠴⢃⣿⣿⣿⣿⣷⡟⣿⣿⣿⣿⣿⣟⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠄⠸⡆⡄⢿⣿⣿⣿⣿⣿⡻⢄⠙⢿⣻⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣾⢻⣿⣿⣿⢈⣷⣿⣿⣿⣿⣿⣿⣿⡆⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⡆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢱⠐⠹⣵⠀⣿⣿⣿⣿⣿⢿⠦⠀⠀⠀⠀⠀⠀⠂⠀⠀⠀⠀⠀⠀⠀⡠⠞⠁⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡷⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⡁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⠀⠀⠘⢦⣿⣿⣿⣿⣿⣮⣆⠀⠀⠀⠀⠀⠈⠂⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣇⢣⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠸⠀⠀⠀⢸⣿⣿⣿⣿⣿⣿⣿⣦⣤⡤⠀⠀⠀⠀⢀⣀⣀⣀⡀⠀⠀⢀⠴⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡌⡆⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⢰⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡅⠀⠀⠀⣾⠇⣿⣿⣿⣿⣿⣿⣿⣿⣶⣄⡀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣠⣶⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⠘⡀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡜⠀⠀⠀⣸⡟⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣢⢄⠀⠀⢀⣤⣶⣿⢟⣿⣿⣿⣿⠰⢸⠾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡆⢡⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠰⡀⠀⠀⠀⠀⠀⠀⢀⠜⠀⠀⠀⣰⡟⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠇⠉⣫⢻⡿⠛⢁⢾⣿⣿⣿⡇⠇⡜⠀⡿⣻⣿⣿⣿⣿⣿⣿⣿⣿⣻⡈⡆⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠑⢄⠀⠀⠀⡠⠔⠁⠀⠀⠀⣰⡟⠀⠀⣟⣿⣿⣿⣿⣿⣿⠿⠛⠋⠉⠉⠛⠻⢗⠏⠏⢸⢇⢠⠟⣾⣿⣿⣿⣱⠊⠀⠀⡿⡞⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⢸⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠈⠁⠀⠀⠀⠀⢀⡾⠋⠀⠀⣸⠇⣿⣹⣿⣿⣿⣇⠀⠀⠀⠀⠀⠀⠀⡈⠀⠀⠸⢻⠋⢸⣿⣿⣿⢿⠃⠀⠀⠀⣇⠗⢿⡇⢹⣿⣿⢿⣿⣿⣿⣿⣏⡆⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡰⠛⠁⠀⠀⢠⡟⢀⣿⣿⣿⣿⣿⡟⣄⠀⠀⠀⠀⢠⣴⣧⣤⣄⣠⠣⣀⣿⣿⣿⣟⠎⠀⠀⠀⠀⣽⠀⠘⣿⠊⠫⡺⣷⣌⠉⡿⢿⣿⡇⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡠⠊⠀⠀⠀⢀⡠⣾⣁⣼⣿⣿⣿⢹⣿⡇⠈⠑⠂⠀⠀⠈⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣽⣿⣿⠇⡜⠘⡄⠀⠹⣧⠀⠈⠪⢙⢻⠷⠦⠿⣿⡄⠀⠀
⠀⠀⢀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡠⠊⠀⣀⠔⣒⣵⣾⣿⣿⣿⣿⣿⣿⡇⢸⣿⠀⠀⡇⠀⠀⠀⠀⣿⣿⣿⣿⠿⣿⣿⣿⣿⣿⣿⣿⣿⢋⡼⠔⠀⠉⢄⡀⠙⣧⠀⣀⡴⠉⠉⠉⠉⠹⣷⡀⠀
⠀⠈⢏⣷⣮⣕⠢⠀⠀⠀⠀⢠⠞⢀⠔⢉⣴⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⠁⣸⠃⠀⠠⠃⠀⠀⠀⢐⡨⠋⠀⣗⡄⢸⣿⣿⡿⡿⣿⡿⢣⠊⠀⠀⠀⠀⠀⠈⠑⠚⠻⣿⣄⣀⡀⠀⢀⣠⣿⣗⡀
⠀⠀⠀⢻⣿⣿⣿⣄⢂⠀⢠⣟⠔⠁⣰⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡟⢀⠏⣀⠞⠀⠀⠀⠀⠀⠈⠀⠀⠀⣿⠀⢸⣿⣟⠀⢣⠀⡰⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠉⠛⠛⠛⠛⠊⢸⣿⡝
⠀⠀⠀⠀⢻⣿⣿⣿⣆⢃⢸⡏⢀⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⣾⣿⡁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣧⢸⣿⡟⠀⠸⠊⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣼⣿⣷
⠀⠀⠀⠀⠀⢻⣿⣿⣿⡞⡔⣣⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣄⠀⠀⠀⠀⠀⠀⠀⠀⣠⠀⠘⠻⡼⣇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡞⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⢻⣿
⠀⠀⠀⠀⠀⠀⢻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣆⠀⠀⠀⠀⠀⠀⢀⠇⠀⠀⠀⠑⠌⠢⠀⣀⣀⠀⠀⠀⠀⠀⠀⣽⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢰⣿⢸⣿
⠀⠀⠀⠀⠀⠀⠈⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣠⣰⣿⣿⣯⣆⠀⠀⠀⠀⠀⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣼⣿⢸⣿
⠀⠀⠀⠀⠀⠀⠀⠈⣏⠻⢿⣿⣿⣿⣿⣿⣿⡇⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⡄⠀⠀⠆⠀⢀⣠⢰⣿⣿⣿⣿⣿⣿⣿⣿⡆⠀⠀⠀⠜⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣿⡟⢸⡟
⠀⠀⠀⠀⠀⠀⠀⠀⢸⢇⠈⢿⣿⣿⣿⣿⣿⠁⢀⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄⡈⣠⣶⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣆⠀⢠⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣾⡟⢁⡟⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠘⠀⠆⠈⢿⣿⣿⣿⡇⠀⢸⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄⡎⠀⠀⠀⠀⠀⣀⣀⣀⣀⣀⣰⣏⣀⣊⣀⣀
*/

Subtask #1
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Incorrect 0 ms 332 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Incorrect 0 ms 332 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Incorrect 0 ms 332 KB Output isn't correct
4 Halted 0 ms 0 KB -