結果

問題 No.95 Alice and Graph
ユーザー tu-sa
提出日時 2018-06-27 03:47:43
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
CE  
(最新)
AC  
(最初)
実行時間 -
コード長 7,280 bytes
コンパイル時間 1,054 ms
コンパイル使用メモリ 118,592 KB
最終ジャッジ日時 2024-11-14 20:29:59
合計ジャッジ時間 1,423 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge2
このコードへのチャレンジ
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コンパイルエラー時のメッセージ・ソースコードは、提出者また管理者しか表示できないようにしております。（リジャッジ後のコンパイルエラーは公開されます）
ただし、clay言語の場合は開発者のデバッグのため、公開されます。

コンパイルメッセージ
main.cpp: In function 'std::ostream& operator<<(std::ostream&, const iter_pair_t<T>&)':
main.cpp:80:33: error: 'ostream_iterator' was not declared in this scope
   80 |         std::copy(v.beg, v.end, ostream_iterator<typename decltype(v.beg)::reference>(out, " "));
      |                                 ^~~~~~~~~~~~~~~~
main.cpp:28:1: note: 'std::ostream_iterator' is defined in header '<iterator>'; did you forget to '#include <iterator>'?
   27 | #include <mutex>
  +++ |+#include <iterator>
   28 | using namespace std;
main.cpp:80:85: error: expected '(' before '>' token
   80 |         std::copy(v.beg, v.end, ostream_iterator<typename decltype(v.beg)::reference>(out, " "));
      |                                                                                     ^
      |                                                                                     (

ソースコード

diff #
プレゼンテーションモードにする

////////////////////////////////////////
///  tu3 pro-con template            ///
////////////////////////////////////////
#include <cassert>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <algorithm>
#include <numeric>
#include <functional>
#include <vector>
#include <queue>
#include <string>
#include <complex>
#include <stack>
#include <set>
#include <map>
#include <list>
#include <unordered_map>
#include <unordered_set>
#include <bitset>
#include <regex>
#include <type_traits>
#include <mutex>
using namespace std;
//// MACRO ////
#define countof(a) (sizeof(a)/sizeof(a[0]))
#define REP(i,n) for (int i = 0; i < (n); i++)
#define RREP(i,n) for (int i = (n)-1; i >= 0; i--)
#define FOR(i,s,n) for (int i = (s); i < (n); i++)
#define RFOR(i,s,n) for (int i = (n)-1; i >= (s); i--)
#define pos(c,i) c.being() + (i)
#define allof(c) c.begin(), c.end()
#define aallof(a) a, countof(a)
#define partof(c,i,n) c.begin() + (i), c.begin() + (i) + (n)
#define apartof(a,i,n) a + (i), a + (i) + (n)
typedef unsigned int uint;
typedef long long llong;
typedef unsigned long long ullong;
#define EPS 1e-9
#define INF (1L << 28)
#define LINF (1LL << 60)
#define PREDICATE(t,a,exp) [&](const t & a) -> bool { return exp; }
#define COMPARISON_T(t) bool(*)(const t &, const t &)
#define COMPARISON(t,a,b,exp) [&](const t & a, const t & b) -> bool { return exp; }
#define CONVERTER(TSrc,t,TDest,exp) [&](const TSrc &t)->TDest { return exp; }
inline int sign_of(double x) { return abs(x) < EPS ? 0 : x > 0 ? 1 : -1; }
inline bool inRange(int val, int min, int max) { return val >= min && val < max; }
inline bool inRange(double val, double min, double max) { return val - min > -EPS && val - max < EPS; }
inline bool inRange(int x, int y, int W, int H) { return x >= 0 && x < W && y >= 0 && y < H; } // W,H含まない
template <class T> struct vevector : public vector<vector<T>> { vevector(int n = 0, int m = 0, const T &initial = T()) : vector<vector<T>>(n, vector
    <T>(m, initial)) { } };
template <class T> struct vevevector : public vector<vevector<T>> { vevevector(int n = 0, int m = 0, int l = 0, const T &initial = T()) : vector
    <vevector<T>>(n, vevector<T>(m, l, initial)) { } };
template <class T> struct vevevevector : public vector<vevevector<T>> { vevevevector(int n = 0, int m = 0, int l = 0, int k = 0, const T &initial = T
    ()) : vector<vevevector<T>>(n, vevevector<T>(m, l, k, initial)) { } };
//// i/o helper ////
namespace std {
    template <class T1, class T2> inline istream & operator >> (istream & in, pair<T1, T2> &p) { in >> p.first >> p.second; return in; }
    template <class T1, class T2> inline ostream & operator << (ostream &out, const pair<T1, T2> &p) { out << p.first << " " << p.second; return out; 
        }
}
template <class T> T read() { T t; cin >> t; return t; }
template <class T> vector<T> read(int n) { vector<T> v; REP(i, n) { v.push_back(read<T>()); } return v; }
template <class T> vevector<T> read(int n, int m) { vevector<T> v; REP(i, n) v.push_back(read<T>(m)); return v; }
template <class T> vector<T> readjag() { return read<T>(read<int>()); }
template <class T> vevector<T> readjag(int n) { vevector<T> v; REP(i, n) v.push_back(readjag<T>()); return v; }
template <class T> struct iter_pair_t { T beg, end; };
template <class T> iter_pair_t<T> iter_pair(T beg, T end) { return iter_pair_t<T>{beg, end}; }
template <class T> ostream & operator << (ostream &out, const iter_pair_t<T> &v)
{
    std::copy(v.beg, v.end, ostream_iterator<typename decltype(v.beg)::reference>(out, " "));
    return out;
}
template <class T1> ostream & operator << (ostream &out, const vector<T1> &v) { return out << iter_pair(begin(v), end(v)); }
template <class T1> ostream & operator << (ostream &out, const set<T1> &v) { return out << iter_pair(begin(v), end(v)); }
template <class T1, class T2> ostream & operator << (ostream &out, const map<T1, T2> &v) { return out << iter_pair(begin(v), end(v)); }
struct _Reader { istream &cin; template <class T> _Reader operator ,(T &rhs) { cin >> rhs; return *this; } };
struct _Writer { ostream &cout; bool f{ false }; template <class T> _Writer operator ,(const T &rhs) { cout << (f ? " " : "") << rhs; f = true; 
    return *this; } };
#define READ(t,...) t __VA_ARGS__; (_Reader{cin}), __VA_ARGS__
#define WRITE(...) (_Writer{cout}), __VA_ARGS__; cout << endl
#define DEBUG(...) (_Writer{cerr}), __VA_ARGS__; cerr << endl
void solve();
int main()
{
    cin.tie(0);
    ios_base::sync_with_stdio(false);
    cout << setprecision(std::numeric_limits<double>::max_digits10);
    solve();
    return 0;
}
// warshall_floyd //
template <class COST>
void warshall_floyd(vector<vector<COST>> &cost)
{
    size_t n = cost.size();
    REP(k, n) REP(i, n) REP(j, n) cost[i][j] = min(cost[i][j], cost[i][k] + cost[k][j]);
}
#ifdef _MSC_VER
inline uint __builtin_ctz(uint x) { unsigned long r; _BitScanForward(&r, x); return r; } // if x == 0 returns undefined.
inline ullong __builtin_ctzll(unsigned long long x) { return x & 0xFFFFFFFF ? __builtin_ctz(x & 0xFFFFFFFF) : __builtin_ctz(x >> 32) + 32; }
#endif
// uint bit permutation //
struct BitPermutation
{
    using TVal = unsigned int;
    static int bsf(uint x) { return x ? __builtin_ctz(x) : -1; }
    static int bsf(ullong x) { return x ? __builtin_ctzll(x) : -1; }
    static TVal next_bit_permutation(TVal x) {
        TVal t = x | (x - 1);
        TVal p = (~t & -~t) - 1;
        return (t + 1) | (p >> (bsf(x) + 1));
    }
    struct it {
        TVal val;
        TVal operator *() const { return val; }
        it& operator ++() { val = next_bit_permutation(val); return *this; }
        bool operator != (it o) const { return val != o.val; }
    };
    it s, e;
    BitPermutation(int n, int k)
        : s{ (TVal(1) << k) - 1 }
        , e{ k > 0 ? TVal(1) << n | ((TVal(1) << (k - 1)) - 1) : next_bit_permutation(0) }
    {
        assert(n >= k);
    }
    it begin() const { return s; }
    it end() const { return e; }
};
using TCost = int;
int solveTsp(const vevector<TCost> &g, const vector<int> &targets, int start = 0, bool needToReturnStart = false)
{
    int N = targets.size();
    vevector<TCost> dp(1 << N, N, INF);
    dp[1 << start][start] = 0;
    FOR(i, 1, N)
    {
        for (int n : BitPermutation(N, i))
        {
            REP(from, N)
            {
                if (dp[n][from] == INF) { continue; }
                REP(to, N)
                {
                    dp[n | 1 << to][to] = min(dp[n | 1 << to][to], dp[n][from] + g[targets[from]][targets[to]]);
                }
            }
        }
    }
    if (needToReturnStart)
    {
        return dp[(1 << N) - 1][start];
    }
    else
    {
        return *min_element(allof(dp[(1 << N) - 1]));
    }
}
////////////////////
/// template end ///
////////////////////
void solve()
{
    READ(int, N, M, K);
    vevector<int> routes(N, N, INF);
    REP(i, M)
    {
        READ(int, U, V);
        routes[U - 1][V - 1] = 1;
        routes[V - 1][U - 1] = 1;
    }
    REP(i, N)
    {
        routes[i][i] = 0;
    }
    warshall_floyd(routes);
    vector<int> cand;
    FOR(i, 1, N)
    {
        if (routes[0][i] <= K)
        {
            cand.push_back(i);
        }
    }
    sort(allof(cand), greater<int>());
    N = cand.size();
    vector<int> targets; 
    targets.push_back(0);
    llong ans = 0;
    for (auto c : cand)
    {
        targets.push_back(c);
        int cost = solveTsp(routes, targets);
        if (cost > K)
        {
            targets.pop_back();
            continue;
        }
        llong tmp = 0;
        for (auto id : targets)
        {
            tmp += (1ll << id) - 1;
        }
        ans = max(ans, tmp);
    }
    WRITE(ans);
}
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