結果

問題 No.1688 Veterinarian
ユーザー ruthenruthen
提出日時 2021-09-24 22:25:54
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 213 ms / 3,000 ms
コード長 4,268 bytes
コンパイル時間 1,715 ms
コンパイル使用メモリ 170,020 KB
実行使用メモリ 113,280 KB
最終ジャッジ日時 2024-07-05 10:54:17
合計ジャッジ時間 2,795 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
6,816 KB
testcase_01 AC 3 ms
6,940 KB
testcase_02 AC 3 ms
6,940 KB
testcase_03 AC 2 ms
6,944 KB
testcase_04 AC 2 ms
6,940 KB
testcase_05 AC 2 ms
6,940 KB
testcase_06 AC 9 ms
10,112 KB
testcase_07 AC 6 ms
6,944 KB
testcase_08 AC 213 ms
113,280 KB
testcase_09 AC 205 ms
109,312 KB
testcase_10 AC 28 ms
20,480 KB
testcase_11 AC 26 ms
17,152 KB
testcase_12 AC 4 ms
6,944 KB
testcase_13 AC 9 ms
8,832 KB
testcase_14 AC 6 ms
6,940 KB
testcase_15 AC 19 ms
13,952 KB
testcase_16 AC 3 ms
6,940 KB
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 #

#include <bits/stdc++.h>
using namespace std;

// clang-format off
//#include <atcoder/modint>
//using namespace atcoder;
using ll = long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pdd = pair<ld, ld>;
using vii = vector<int>;
using vll = vector<ll>;
using vdd = vector<ld>;
using vvii = vector<vector<int>>;
using vvll = vector<vector<ll>>;
using vvdd = vector<vector<ld>>;
using vvvii = vector<vector<vector<int>>>;
using vvvll = vector<vector<vector<ll>>>;
using vvvdd = vector<vector<vector<ld>>>;
template<class T, class U> using P = pair<T, U>;
template<class T> using V1 = vector<T>;
template<class T> using V2 = vector<vector<T>>;
template<class T> using V3 = vector<vector<vector<T>>>;
template<class T> using pque = priority_queue<T, vector<T>, greater<T>>;
#define _overload3(_1, _2, _3, name, ...) name
#define rep1(n) for (ll i = 0; i < (n); i++)
#define rep2(i, n) for (ll i = 0; i < (n); i++)
#define rep3(i, a, b) for (ll i = (a); i < (b); i++)
#define rep(...) _overload3(__VA_ARGS__, rep3, rep2, rep1)(__VA_ARGS__)
#define rrep1(n) for (ll i = (n) - 1; i >= 0; i--)
#define rrep2(i, n) for (ll i = (n) - 1; i >= 0; i--)
#define rrep3(i, a, b) for (ll i = (b) - 1; i >= (a); i--)
#define rrep(...) _overload3(__VA_ARGS__, rrep3, rrep2, rrep1)(__VA_ARGS__)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#define fi first
#define se second
#define pb push_back
#define endl '\n'
#define popcnt(x) __builtin_popcountll(x)
#define uniq(x) (x).erase(unique((x).begin(), (x).end()), (x).end());
#define IOS ios::sync_with_stdio(false); cin.tie(nullptr);
const int inf = 1 << 30;
const ll INF = 1ll << 60;
const ld DINF = numeric_limits<ld>::infinity();
const ll mod = 1000000007;
//const ll mod = 998244353;
const ld EPS = 1e-9;
const ld PI = 3.1415926535897932;
const ll dx[8] = {1, 0, -1, 0, 1, -1, -1, 1};
const ll dy[8] = {0, 1, 0, -1, 1, 1, -1, -1};
template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; }
template<typename T> T minV(const vector<T> &x) { return *min_element(all(x)); }
template<typename T> T maxV(const vector<T> &x) { return *max_element(all(x)); }
template<class T, class U> ostream &operator<<(ostream &os, const pair<T, U> &p) { return os << "(" << p.fi << ", " << p.se << ")"; }
template<class T> ostream &operator<<(ostream &os, const vector<T> &v) { os << "[ "; for (auto &z : v) os << z << " "; os << "]"; return os; }
#ifdef _DEBUG
#define show(x) cout << #x << " = " << x << endl;
#else
#define show(x)
#endif
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
ll lcm(ll a, ll b) { return (a / gcd(a, b)) * b; }
ll rem(ll a, ll b) { return (a % b + b) % b; }
// clang-format on

// using mint = modint998244353;
// using mint = modint1000000007;

ll modpow(ll a, ll N, ll mod) {
    ll res = 1;
    // 例えば3=101(2)なので、下位bitから順に1ならa倍する
    while (N) {
        if (N & 1) res = res * a % mod;
        a = a * a % mod;
        N >>= 1;
    }
    return res;
}

ld dp[52][52][52][52];

ll comb2(ll N) { return N * (N - 1) / 2; }

int main() {
    // IOS;
    ll A, B, C, N;
    cin >> A >> B >> C >> N;
    dp[0][0][0][0] = 1;
    rep(i, N) {
        rep(a, A + 1) rep(b, B + 1) rep(c, C + 1) {
            if (a + b + c >= A + B + C - 1) continue;
            ld aa = (ld)comb2(A - a) / comb2(A - a + B - b + C - c);
            ld bb = (ld)comb2(B - b) / comb2(A - a + B - b + C - c);
            ld cc = (ld)comb2(C - c) / comb2(A - a + B - b + C - c);
            ld el = 1 - aa - bb - cc;
            show(a) show(b) show(c) show(aa) show(bb) show(cc) show(el);
            dp[i + 1][a + 1][b][c] += dp[i][a][b][c] * aa;
            dp[i + 1][a][b + 1][c] += dp[i][a][b][c] * bb;
            dp[i + 1][a][b][c + 1] += dp[i][a][b][c] * cc;
            dp[i + 1][a][b][c] += dp[i][a][b][c] * el;
        }
    }
    ld ansA = 0, ansB = 0, ansC = 0;
    rep(a, A + 1) rep(b, B + 1) rep(c, C + 1) {
        ansA += a * dp[N][a][b][c];
        ansB += b * dp[N][a][b][c];
        ansC += c * dp[N][a][b][c];
    }
    printf("%.10Lf %.10Lf %.10Lf\n", ansA, ansB, ansC);
    return 0;
}

/*
メモ
*/
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