Submission #481943

#	Time	Username	Problem	Language	Result	Execution time	Memory
481943		Lam_lai_cuoc_doi	Meetings (JOI19_meetings)	C++17	29 / 100	2111 ms	1688 KiB

meetings

#include <bits/stdc++.h>
#include "meetings.h"

using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;

template <class T>
void read(T &x)
{
    x = 0;
    register int c;
    while ((c = getchar()) && (c > '9' || c < '0'))
        ;
    for (; c >= '0' && c <= '9'; c = getchar())
        x = x * 10 + c - '0';
}

constexpr bool typetest = 0;
constexpr int N = 2e3 + 5;
bool ck[N];

void Recursive(vector<int> &s)
{
    if (s.size() <= 1)
        return;
    if (s.size() == 2)
    {
        Bridge(min(s[0], s[1]), max(s[0], s[1]));
        return;
    }

    int u = s[0], v = s[1];

    vector<int> l, r, use;
    for (int i = 2; i < (int)s.size(); ++i)
        use.emplace_back(s[i]);

    while (!use.empty())
    {
        if (use.back() == u || use.back() == v)
        {
            use.pop_back();
            continue;
        }

        int z = Query(u, v, use.back());
        if (z == u)
            r.emplace_back(use.back());
        else if (z == v)
            l.emplace_back(use.back());
        else
        {
            if (use.back() != z)
                l.emplace_back(use.back());
            l.emplace_back(v);
            v = z;
        }
        use.pop_back();
    }

    Bridge(min(u, v), max(u, v));

    l.emplace_back(v);
    r.emplace_back(u);

    Recursive(l);
    Recursive(r);
}

void Solve(int n)
{
    vector<int> s;
    for (int i = 0; i < n; ++i)
        s.emplace_back(i);
	random_shuffle(s.begin(), s.end());
    Recursive(s);
}

/*
void Read()
{
}

void Solve()
{
}

int32_t main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if (fopen("xor.INP", "r"))
    {
        freopen("xor.inp", "r", stdin);
        freopen("xor.out", "w", stdout);
    }
    int t(1);
    if (typetest)
        cin >> t;
    for (int _ = 1; _ <= t; ++_)
    {
        // cout << "Case #" << _ << ": ";
        Read();
        Solve();
    }
    // cerr << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
}

*/

Compilation message (stderr)

meetings.cpp: In function 'void read(T&)':
meetings.cpp:13:18: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   13 |     register int c;
      |                  ^
meetings.cpp: In function 'void Solve(int)':
meetings.cpp:75:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   75 |     for (int i = 0; i < n; ++i)
      |     ^~~
meetings.cpp:77:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   77 |  random_shuffle(s.begin(), s.end());
      |  ^~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 0 / 71