結果

問題 No.133 カードゲーム
ユーザー mmn15277198
提出日時 2021-04-14 22:25:58
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 5 ms / 5,000 ms
コード長 2,930 bytes
コンパイル時間 1,147 ms
コンパイル使用メモリ 105,472 KB
実行使用メモリ 7,040 KB
最終ジャッジ日時 2024-06-30 21:12:48
合計ジャッジ時間 2,342 ms
ジャッジサーバーID
(参考情報)
judge1 / judge2
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 4
other AC * 19
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <iostream>
#include <vector>
#include <functional>
#include <algorithm>
#include <map>
#include <cstdio>
#include <cmath>
#include <iomanip>
#include <queue>
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); i++)
#define vi vector<int>
#define vll vector<long long>
#define vb vector<bool>
#define vs vector<string>
#define all(x) x.begin() , x.end()
#define pb push_back
#define eb emplace_back
#define chmax(x,y) (x) = max((x) , (y))
#define chmin(x,y) (x) = min((x) , (y))
#define fi first
#define se second
typedef long long ll;
typedef long double ld;
//const int MOD = int(1e9) + 7;
//const int MOD = 998244353;
const ll MOD = ll(1e9) + 7;
//const ll MOD = 998244353;
const ld PI = 3.1415926535897932384626;
const int INF = 1001001001;
const ll LINF = 1001001001001001001;
const int MX = 220000;
ll gcd (ll a , ll b) { if (a < b) swap(a , b); if (a % b == 0) return b; else return gcd(b , a % b); }
ll lcm (ll a , ll b) { return a / gcd(a , b) * b; }
ll lin() { ll x; scanf("%lld" , &x); return x; }
int in() { int x; scanf("%d" , &x); return x; }
bool is_palindrome (string s) { string t = s; reverse(all(t)); return (s == t); }
void io_setup() {
cout << fixed << setprecision(30);
}
ll modpow (ll x , ll p) {
ll ret = 1;
while (p) {
if (p % 2 == 1) {
ret *= x;
ret %= MOD;
}
x *= x;
x %= MOD;
p /= 2;
}
return ret;
}
ll moddiv (ll a , ll b) {
return a * modpow(b , MOD - 2) % MOD;
}
ll modsub (ll a , ll b) {
if (a >= b) return (a - b) % MOD;
else return (MOD - a + b);
}
vll fact(MX);
vll factinv(MX);
void init_fact () {
fact[0] = 1;
for (int i = 1; i < MX; i++) {
fact[i] = 1LL * i * fact[i - 1] % MOD;
}
for (int i = 0; i < MX; i++) {
factinv[i] = modpow(fact[i] , MOD - 2);
}
}
ll nCk (ll n , ll k) {
return ((fact[n] * factinv[k] % MOD) * factinv[n - k] % MOD);
}
bool is_prime (int x) {
if (x == 2 || x == 3 || x == 5 || x == 7) {
return true;
}
for (ll i = 2; i*i <= x; i++) {
if (x % i == 0) {
return false;
}
}
return true;
}
vb prime_table(MX , true);
void init_prime() {
for (int i = 2; i < MX; i++) {
for (int j = i + i; j < MX; j += i) {
prime_table[j] = false;
}
}
return;
}
void solve () {
int n = in();
vi a(n) , b(n);
rep(i,n) a[i] = in();
rep(i,n) b[i] = in();
sort(all(a));
sort(all(b));
int cnt_1 = 0 , cnt_2 = 0;
do {
cnt_1 += 1;
int cnt = 0;
rep(i,n) cnt += (a[i] > b[i]);
if (cnt > n - cnt) cnt_2 += 1;
} while (next_permutation(all(b)));
//cout << cnt_2 << " " << cnt_1 << endl;
ld ans = (ld)cnt_2 / (ld)cnt_1;
cout << ans << endl;
return;
}
int main() {
io_setup();
//init_fact();
//init_prime();
solve();
return 0;
}
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