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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#367389#91. Secret PermutationMax_s_xaM0 0ms0kbC++204.3kb2024-03-25 22:08:502024-03-25 22:08:50

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  • [2024-03-25 22:08:50]
  • 评测
  • 测评结果:0
  • 用时:0ms
  • 内存:0kb
  • [2024-03-25 22:08:50]
  • 提交

answer

#include <iostream>
#include <random>
#include <algorithm>
#include <vector>
#include <cmath>

typedef long long ll;
typedef double lf;

// #define DEBUG 1
struct IO
{
    #define MAXSIZE (1 << 20)
    #define isdigit(x) (x >= '0' && x <= '9')
    char buf[MAXSIZE], *p1, *p2;
    char pbuf[MAXSIZE], *pp;
    #if DEBUG
    #else
    IO() : p1(buf), p2(buf), pp(pbuf) {}
    ~IO() {fwrite(pbuf, 1, pp - pbuf, stdout);}
    #endif
    #define gc() (p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, MAXSIZE, stdin), p1 == p2) ? ' ' : *p1++)
    #define blank(x) (x == ' ' || x == '\n' || x == '\r' || x == '\t')

    template <typename T>
    void Read(T &x)
    {
        #if DEBUG
        std::cin >> x;
        #else
        bool sign = 0; char ch = gc(); x = 0;
        for (; !isdigit(ch); ch = gc())
            if (ch == '-') sign = 1;
        for (; isdigit(ch); ch = gc()) x = x * 10 + (ch ^ 48);
        if (sign) x = -x;
        #endif
    }
    void Read(char *s)
    {
        #if DEBUG
        std::cin >> s;
        #else
        char ch = gc();
        for (; blank(ch); ch = gc());
        for (; !blank(ch); ch = gc()) *s++ = ch;
        *s = 0;
        #endif
    }
    void Read(char &c) {for (c = gc(); blank(c); c = gc());}

    void Push(const char &c)
    {
        #if DEBUG
        putchar(c);
        #else
        if (pp - pbuf == MAXSIZE) fwrite(pbuf, 1, MAXSIZE, stdout), pp = pbuf;
        *pp++ = c;
        #endif
    }
    template <typename T>
    void Write(T x)
    {
        if (x < 0) x = -x, Push('-');
        static T sta[35];
        int top = 0;
        do sta[top++] = x % 10, x /= 10; while (x);
        while (top) Push(sta[--top] ^ 48);
    }
    template <typename T>
    void Write(T x, char lst) {Write(x), Push(lst);}
} IO;
#define Read(x) IO.Read(x)
#define Write(x, y) IO.Write(x, y)
#define Put(x) IO.Push(x)

using namespace std;

const int MAXN = 260, B = 258;

#ifndef DEBUG

#include "permutation.h"

#endif

#ifdef DEBUG

namespace LOCAL
{
    int n, a[MAXN], q;
    inline void Solve()
    {
        Read(n), q = 0;
        for (int i = 1; i <= n; i++) Read(a[i]);
    }
}

int query(vector <int> p)
{
    if (p.size() != LOCAL::n) {cout << "Query too short.\n"; exit(0);}
    LOCAL::q++;
    int sum = 0;
    for (int i = 0; i < LOCAL::n - 1; i++) sum += abs(LOCAL::a[p[i]] - LOCAL::a[p[i + 1]]);
    cout << "Query:\n";
    for (int i = 0; i < LOCAL::n; i++) cout << p[i] << ' '; cout << '\n';
    cout << sum << "\n";
    return sum;
}

void answer(vector <int> p)
{
    if (p.size() != LOCAL::n) {cout << "Answer too short.\n"; exit(0);}
    cout << "Queries used: " << LOCAL::q << "\n";
    for (int i = 0; i < LOCAL::n; i++) cout << p[i] << ' '; cout << '\n';
    exit(0);
}

void solve(int N);

int main()
{
    freopen("B.in", "r", stdin);
    freopen("B.out", "w", stdout);
    LOCAL::Solve();
    solve(LOCAL::n);
    return 0;
}

#endif

mt19937 Rand(102934);

int n, idx[MAXN], a[MAXN], d[MAXN];
vector <int> qry;

int ans[MAXN], rt;
bool vis[MAXN << 1];
inline bool Solve(int cur, int p, int l, int r)
{
    if (r - l > n - 1 || vis[p + B]) return 0;
    if (cur == n)
    {
        ans[cur] = p;
        if (p + d[n] == 0 || p - d[n] == 0) return rt = l, 1;
        return 0;
    }
    vis[p + B] = 1, ans[cur] = p;
    if (Solve(cur + 1, p + d[cur], l, max(r, p + d[cur]))) return 1;
    if (Solve(cur + 1, p - d[cur], min(l, p - d[cur]), r)) return 1;
    vis[p + B] = 0;
    return 0;
}

void solve(int N)
{
    n = N;
    for (int i = 1; i <= n; i++) idx[i] = i;
    shuffle(idx + 1, idx + n + 1, Rand);
    qry.clear();
    for (int i = 1; i <= n; i++) qry.push_back(idx[i]);
    a[0] = query(qry);
    int sum = 0;
    for (int i = 1; i <= n - 1; i++)
    {
        qry.clear();
        for (int j = i; j >= 1; j--) qry.push_back(idx[j]);
        for (int j = n; j > i; j--) qry.push_back(idx[j]);
        a[i] = query(qry), sum += a[i];
    }
    sum -= (n - 2) * a[0], sum /= n - 1;
    d[n] = sum;
    for (int i = 1; i <= n - 1; i++) d[i] = a[0] - a[i] + d[n];
    Solve(1, 0, 0, 0);
    qry.resize(n);
    qry[idx[1] - 1] = 1 - rt;
    for (int i = 2; i <= n; i++) qry[idx[i] - 1] = qry[idx[1] - 1] + ans[i];
    answer(qry);
}

Details

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Subtask #1:

score: 0
Time Limit Exceeded

Test #1:

score: 0
Time Limit Exceeded

input:

7
5 7 1 3 2 4 6

output:

Unauthorized output

result:


Subtask #2:

score: 0
Skipped

Dependency #1:

0%

Subtask #3:

score: 0
Skipped

Dependency #1:

0%