제출 #685411

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
685411		annie2018	Secret Permutation (RMI19_permutation)	C++17	15 / 100	5062 ms	208 KiB

permutation

#include <bits/stdc++.h>
#include "permutation.h"
using namespace std;
vector <int> ans, v;
void get(vector<int> &q, int n)
{
    vector <int> a(n);
    for (int i = 1; i <= n; i++)
        a[i - 1] = i;
    bool f = 1;
    do
    {
        f = 1;
        for (int i = 0; i < n - 1; i++)
            if (abs(a[v[i] - 1] - a[v[i + 1] - 1]) != q[i])
                f = 0;
        if (abs(a[v[0] - 1] - a[v[n - 1] - 1]) != q[n - 1])
            f = 0;
        if (f)
        {
            ans = a;
            return;
        }
    }
    while (next_permutation(a.begin(), a.end()));
}

void solve(int n) {
    srand(chrono::steady_clock::now().time_since_epoch().count());
    for (int i = 1; i <= n; i++)
        v.push_back(i);
    random_shuffle(v.begin(), v.end());
    vector <int> q(n);
    for(int i = 0; i < n; i++)
    {
        q[i] = query(v);
        rotate(v.begin(),v.begin()+1,v.end());
    }
    int sum = 0;
    for(int i = 0; i < n; i++)
        sum += q[i];
    sum /= (n - 1);
    for(int i = 0; i < n; i++)
        q[i] = (sum - q[i]);
    rotate(q.begin(), q.begin() + 1, q.end());
    /*for (int i = 0; i < n; i++)
        cout << q[i] << ' ';
    cout << "\n";*/
    //ans.assign(n, 0);
    get(q, n);
    answer(ans);
}

컴파일 시 표준 에러 (stderr) 메시지

stub.cpp: In function 'int query(int*)':
stub.cpp:15:9: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   fscanf(stdin, "%d", &x);
      |   ~~~~~~^~~~~~~~~~~~~~~~~
stub.cpp: In function 'int main(int, char**)':
stub.cpp:48:9: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |   fscanf(stdin, "%d", &N);
      |   ~~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 0 / 35
• Subtask 3: 0 / 50