結果
| 問題 | No.155 生放送とBGM |
| ユーザー |
 satashun
|
| 提出日時 | 2023-08-11 23:06:17 |
| 言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
| 結果 |
AC
|
| 実行時間 | 2,441 ms / 6,000 ms |
| コード長 | 7,669 bytes |
| コンパイル時間 | 2,380 ms |
| コンパイル使用メモリ | 208,740 KB |
| 実行使用メモリ | 116,264 KB |
| 最終ジャッジ日時 | 2024-11-18 18:23:59 |
| 合計ジャッジ時間 | 18,029 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge3 |
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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 | 2,441 ms
115,468 KB |
| testcase_01 | AC | 2,422 ms
116,264 KB |
| testcase_02 | AC | 2,441 ms
111,556 KB |
| testcase_03 | AC | 1 ms
6,816 KB |
| testcase_04 | AC | 827 ms
68,756 KB |
| testcase_05 | AC | 5 ms
11,680 KB |
| testcase_06 | AC | 2,332 ms
104,044 KB |
| testcase_07 | AC | 16 ms
15,608 KB |
| testcase_08 | AC | 7 ms
12,804 KB |
| testcase_09 | AC | 30 ms
20,048 KB |
| testcase_10 | AC | 10 ms
14,940 KB |
| testcase_11 | AC | 30 ms
19,936 KB |
| testcase_12 | AC | 41 ms
21,744 KB |
| testcase_13 | AC | 23 ms
18,520 KB |
| testcase_14 | AC | 2,137 ms
111,280 KB |
ソースコード
#pragma region satashun
// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
using uint = unsigned int;
using ll = long long;
using ull = unsigned long long;
using pii = pair<int, int>;
template <class T>
using V = vector<T>;
template <class T>
using VV = V<V<T>>;
template <class T>
V<T> make_vec(size_t a) {
return V<T>(a);
}
template <class T, class... Ts>
auto make_vec(size_t a, Ts... ts) {
return V<decltype(make_vec<T>(ts...))>(a, make_vec<T>(ts...));
}
template <typename T, typename V>
void fill_vec(T& v, const V& val) {
v = val;
}
template <typename T, typename V>
void fill_vec(vector<T>& vec, const V& val) {
for (auto& v : vec) fill_vec(v, val);
}
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define rep(i, n) rep2(i, 0, n)
#define rep2(i, m, n) for (int i = m; i < (n); i++)
#define per(i, b) per2(i, 0, b)
#define per2(i, a, b) for (int i = int(b) - 1; i >= int(a); i--)
#define ALL(c) (c).begin(), (c).end()
#define SZ(x) ((int)(x).size())
constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); }
template <class T, class U>
void chmin(T& t, const U& u) {
if (t > u) t = u;
}
template <class T, class U>
void chmax(T& t, const U& u) {
if (t < u) t = u;
}
template <typename T>
int arglb(const V<T>& v, const T& x) {
return distance(v.begin(), lower_bound(ALL(v), x));
}
template <typename T>
int argub(const V<T>& v, const T& x) {
return distance(v.begin(), upper_bound(ALL(v), x));
}
template <class T>
void mkuni(vector<T>& v) {
sort(ALL(v));
v.erase(unique(ALL(v)), end(v));
}
template <class T>
vector<int> sort_by(const vector<T>& v, bool increasing = true) {
vector<int> res(v.size());
iota(res.begin(), res.end(), 0);
if (increasing) {
stable_sort(res.begin(), res.end(),
[&](int i, int j) { return v[i] < v[j]; });
} else {
stable_sort(res.begin(), res.end(),
[&](int i, int j) { return v[i] > v[j]; });
}
return res;
}
// prototype
template <class T, class U>
ostream& operator<<(ostream& os, const pair<T, U>& p);
template <class T>
ostream& operator<<(ostream& os, const vector<T>& v);
template <class T>
istream& operator>>(istream& is, vector<T>& v);
template <class T, size_t sz>
ostream& operator<<(ostream& os, const array<T, sz>& arr);
template <class T>
ostream& operator<<(ostream& os, const set<T>& ST);
template <class T>
ostream& operator<<(ostream& os, const multiset<T>& ST);
template <class T, class U>
ostream& operator<<(ostream& os, const map<T, U>& MP);
ostream& operator<<(ostream& o, __int128_t x);
// io functions
template <class T, class U>
istream& operator>>(istream& is, pair<T, U>& p) {
is >> p.first >> p.second;
return is;
}
template <class T, class U>
ostream& operator<<(ostream& os, const pair<T, U>& p) {
os << "(" << p.first << "," << p.second << ")";
return os;
}
template <class T>
istream& operator>>(istream& is, vector<T>& v) {
for (auto& x : v) {
is >> x;
}
return is;
}
template <class T>
ostream& operator<<(ostream& os, const vector<T>& v) {
os << "{";
rep(i, v.size()) {
if (i) os << ",";
os << v[i];
}
os << "}";
return os;
}
template <class T, size_t sz>
ostream& operator<<(ostream& os, const array<T, sz>& arr) {
os << '[';
for (auto v : arr) os << v << ',';
os << ']';
return os;
}
template <class T>
ostream& operator<<(ostream& os, const set<T>& ST) {
os << "{";
for (auto it = ST.begin(); it != ST.end(); ++it) {
if (it != ST.begin()) os << ",";
os << *it;
}
os << "}";
return os;
}
template <class T>
ostream& operator<<(ostream& os, const multiset<T>& ST) {
os << "{";
for (auto it = ST.begin(); it != ST.end(); ++it) {
if (it != ST.begin()) os << ",";
os << *it;
}
os << "}";
return os;
}
template <class T, class U>
ostream& operator<<(ostream& os, const map<T, U>& MP) {
for (auto it = MP.begin(); it != MP.end(); ++it) {
os << "(" << it->first << ": " << it->second << ")";
}
return os;
}
string to_string(__int128_t x) {
if (x == 0) return "0";
string result;
if (x < 0) {
result += "-";
x *= -1;
}
string t;
while (x) {
t.push_back('0' + x % 10);
x /= 10;
}
reverse(t.begin(), t.end());
return result + t;
}
ostream& operator<<(ostream& o, __int128_t x) { return o << to_string(x); }
#ifdef LOCAL
void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
cerr << " " << H;
debug_out(T...);
}
#define debug(...) \
cerr << __LINE__ << " [" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl
#else
#define debug(...) (void(0))
#define dump(x) (void(0))
#endif
template <class T>
V<T>& operator+=(V<T>& vec, const T& v) {
for (auto& x : vec) x += v;
return vec;
}
template <class T>
V<T>& operator-=(V<T>& vec, const T& v) {
for (auto& x : vec) x -= v;
return vec;
}
// suc : 1 = newline, 2 = space
template <class T>
void print(T x, int suc = 1) {
cout << x;
if (suc == 1)
cout << "\n";
else if (suc == 2)
cout << " ";
}
template <class T>
void print(const vector<T>& v, int suc = 1) {
for (int i = 0; i < v.size(); ++i)
print(v[i], i == int(v.size()) - 1 ? suc : 2);
}
template <class T>
void show(T x) {
print(x, 1);
}
template <typename Head, typename... Tail>
void show(Head H, Tail... T) {
print(H, 2);
show(T...);
}
int topbit(int t) { return t == 0 ? -1 : 31 - __builtin_clz(t); }
int topbit(ll t) { return t == 0 ? -1 : 63 - __builtin_clzll(t); }
int botbit(int a) { return a == 0 ? 32 : __builtin_ctz(a); }
int botbit(ll a) { return a == 0 ? 64 : __builtin_ctzll(a); }
int popcount(int t) { return __builtin_popcount(t); }
int popcount(ll t) { return __builtin_popcountll(t); }
int bit_parity(int t) { return __builtin_parity(t); }
int bit_parity(ll t) { return __builtin_parityll(t); }
struct prepare_io {
prepare_io() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
cout << fixed << setprecision(10);
}
} prep_io;
#pragma endregion satashun
const int MX = 250000;
ll dp[51][MX], sub[51][MX];
void slv() {
// input
int N, L;
cin >> N >> L;
L *= 60;
V<int> S;
rep(i, N) {
string s;
cin >> s;
int m = ((s[0] - '0') * 10 + (s[1] - '0')) * 60 +
((s[3] - '0') * 10 + (s[4] - '0'));
S.pb(m);
}
int sum = accumulate(ALL(S), 0);
if (sum <= L) {
show(N);
return;
}
// solve
V<double> fac(N + 1);
fac[0] = 1;
rep(i, N) fac[i + 1] = fac[i] * (i + 1);
debug(L, S);
dp[0][0] = 1;
rep(i, N) {
per(s, N) {
rep(m, MX) {
if (dp[s][m] && m + S[i] < MX) {
dp[s + 1][m + S[i]] += dp[s][m];
}
}
}
}
double ans = 0;
for (int x : S) {
rep(i, N + 1) rep(j, MX) sub[i][j] = dp[i][j];
rep(i, N) {
rep(j, MX - x) { sub[i + 1][j + x] -= sub[i][j]; }
rep(j, L) {
if (sub[i][j] > 0) {
ans += sub[i][j] * fac[i] * fac[N - i - 1];
}
}
}
}
ans /= fac[N];
show(ans);
}
int main() {
int cases = 1;
// cin >> cases;
rep(i, cases) slv();
return 0;
}