Submission #995077

#	Time	Username	Problem	Language	Result	Execution time	Memory
995077		otarius	Library (JOI18_library)	C++17	0 / 100	33 ms	344 KiB

library

#include "library.h"
#include <bits/stdc++.h>
using namespace std;
#define ff first
#define sc second
#define pb push_back
#define pii pair<int, int>

void Solve(int n) {
    vector<int> ans(n);
    vector<int> v(n, 1);
    bool used[n + 1] = {};
    for (int i = 1; i <= n; i++) {
        v[i - 1] = 0;
        if (Query(v) == 1) {
            ans[0] = i; used[i] = 1; break;
        } v[i - 1] = 1;
    }
    for (int i = 2; i < n; i++) {
        vector<int> cur;
        for (int j = 1; j <= n; j++)
            if (!used[j]) cur.pb(j);
        int l = 0, r = cur.size() - 1, m, an;
        while (l <= r) {
            m = (l + r) / 2;
            for (int &k : v) k = 0;
            v[ans[i - 2] - 1] = 1;
            for (int k = 0; k <= m; k++)
                v[cur[k] - 1] = 1;
            int vl = Query(v);
            v[ans[i - 2] - 1] = 0;
            if (Query(v) == vl) {
                an = m; r = m - 1;
            } else l = m + 1;
        } ans[i - 1] = cur[an]; used[cur[an]] = 1;
    } for (int i = 1; i <= n; i++)
        if (!used[i]) ans[n - 1] = i;
    Answer(ans);
}

Compilation message (stderr)

library.cpp: In function 'void Solve(int)':
library.cpp:35:30: warning: 'an' may be used uninitialized in this function [-Wmaybe-uninitialized]
   35 |         } ans[i - 1] = cur[an]; used[cur[an]] = 1;
      |                              ^

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