結果
問題 | No.2955 Pizza Delivery Plan |
ユーザー |
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提出日時 | 2024-11-08 23:00:30 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 234 ms / 2,000 ms |
コード長 | 2,950 bytes |
コンパイル時間 | 1,831 ms |
コンパイル使用メモリ | 177,136 KB |
実行使用メモリ | 40,448 KB |
最終ジャッジ日時 | 2024-11-08 23:00:42 |
合計ジャッジ時間 | 6,303 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 28 |
ソースコード
#include <bits/stdc++.h>using namespace std;#define CPP_STR(x) CPP_STR_I(x)#define CPP_CAT(x, y) CPP_CAT_I(x, y)#define CPP_STR_I(args...) #args#define CPP_CAT_I(x, y) x##y#define ASSERT(expr...) assert((expr))using i8 = int8_t;using u8 = uint8_t;using i16 = int16_t;using u16 = uint16_t;using i32 = int32_t;using u32 = uint32_t;using i64 = int64_t;using u64 = uint64_t;using f32 = float;using f64 = double;// }}}constexpr i64 INF = 1'010'000'000'000'000'017LL;constexpr i64 MOD = 998244353LL;constexpr f64 EPS = 1e-12;constexpr f64 PI = 3.14159265358979323846;#define M5 100007#define M9 1000000000#define F first#define S second// util {{{#define FOR(i, start, end) for (i64 i = (start), CPP_CAT(i, xxxx_end) = (end); i < CPP_CAT(i, xxxx_end); ++i)#define REP(i, n) FOR(i, 0, n)#define all(x) (x).begin(), (x).end()#define ll long long int#define VI vector<ll>#define VVI vector<VI>#define ISD true#define debug(x) \if (ISD) \cout << #x << ": " << x << endltemplate <typename T, typename U, typename Comp = less<>>bool chmax(T &xmax, const U &x, Comp comp = {}){if (comp(xmax, x)){xmax = x;return true;}return false;}template <typename T, typename U, typename Comp = less<>>bool chmin(T &xmin, const U &x, Comp comp = {}){if (comp(x, xmin)){xmin = x;return true;}return false;}int main(){ll N, K;cin >> N >> K;vector<ll> X(N + 1), Y(N + 1);REP(i, N){cin >> X[i + 1] >> Y[i + 1];}auto dis = [&](ll x1, ll y1, ll x2, ll y2){return sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));};auto calc = [&](int i, int j, bool is0){if (is0){return dis(0, 0, X[i], Y[i]) + dis(0, 0, X[j], Y[j]);}else{return dis(X[i], Y[i], X[j], Y[j]);}};double IN = 100000000000000;vector<vector<vector<double>>> dp((1 << N), vector<vector<double>>(K + 1, vector<double>(N + 1, IN)));dp[0][K][0] = 0;REP(bit, (1 << N)){REP(k, K + 1){REP(i, N + 1){if (dp[bit][k][i] == IN){continue;}if (k > 0){REP(j, N){chmin(dp[bit | (1 << j)][k - 1][j + 1], dp[bit][k][i] + calc(i, j + 1, 0));}}REP(j, N){chmin(dp[bit | (1 << j)][K - 1][j + 1], dp[bit][k][i] + calc(i, j + 1, 1));}}}}double ans = IN;REP(k, K + 1){REP(i, N + 1){chmin(ans, dp[((1 << N) - 1)][k][i] + calc(0, i, 0));}}cout << fixed << setprecision(10) << ans << endl;}