Submission #1081600

#	Time	Username	Problem	Language	Result	Execution time	Memory
1081600		kustizus	Library (JOI18_library)	C++17	0 / 100	2 ms	344 KiB

library

// #pragma GCC optimize("O3","unroll-loops")
#include <bits/stdc++.h>
#include "library.h"
using namespace std;

// #define 
// #define int long long
#define all(v) v.begin(), v.end()
#define fi first
#define se second

mt19937_64 rnd(chrono::high_resolution_clock::now().time_since_epoch().count());
// declare

void Solve(int n)
{
    int idx;
    vector <int> m(n, 1);
    for (int i = 1; i <= n; ++i)
    {
        m[i - 1] = 0;
        int ans = Query(m);
        if (ans == 1)
        {
            idx = i;
            break;
        }
    }
    vector <int> ans = {idx};
    vector <bool> vs(n, false);
    for (int i = 1; i < n; ++i){
        vs[idx - 1] = true;
        vector <int> now;
        for (int j = 0; j < n; ++j)
            if (!vs[j])
                now.push_back(j);
        int l = 1, r = now.size();
        while (l < r){
            int md = l + r >> 1;
            vector <int> m(n, 0);
            for (int i = l; i <= md; ++i)
                m[now[i - 1] - 1] = 1;
            int c1 = Query(m);
            m[idx - 1] = 1;
            int c2 = Query(m);
            if (c1 == c2) r = md;
            else l = md + 1;
        }
        ans.push_back(now[l - 1]);
        idx = now[l - 1];
    }
    Answer(ans);
}

Compilation message (stderr)

library.cpp: In function 'void Solve(int)':
library.cpp:39:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   39 |             int md = l + r >> 1;
      |                      ~~^~~
library.cpp:17:9: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   17 |     int idx;
      |         ^~~

• Subtask 1: 0 / 19
• Subtask 2: 0 / 81