Submission #133905

#	Time	Username	Problem	Language	Result	Execution time	Memory
133905		duality	Library (JOI18_library)	C++11	100 / 100	520 ms	456 KiB

library

#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
typedef long long int LLI;
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef vector<pii> vpii;
#include "library.h"

void Solve(int N) {
    if (N == 1) {
        vi v;
        v.pb(1);
        Answer(v);
        return;
    }

    int i;
    vi M(N,1);
    for (i = 0; i < N; i++) {
        M[i] = 0;
        if (Query(M) == 1) break;
        else M[i] = 1;
    }
    vi ans,rem;
    ans.pb(i);
    for (i = 0; i < N; i++) {
        if (i != ans.back()) rem.pb(i);
    }
    while (ans.size() < N) {
        int l = 0,r = rem.size()-1;
        while (l < r) {
            int m = (l+r) / 2;
            fill(M.begin(),M.end(),0);
            for (i = l; i <= m; i++) M[rem[i]] = 1;
            int x = Query(M);
            M[ans.back()] = 1;
            if (Query(M) == x) r = m;
            else l = m+1;
        }
        ans.pb(rem[l]);
        rem[l] = rem.back(),rem.pop_back();
    }
    for (i = 0; i < ans.size(); i++) ans[i]++;
    Answer(ans);
}

Compilation message (stderr)

library.cpp: In function 'void Solve(int)':
library.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while (ans.size() < N) {
            ~~~~~~~~~~~^~~
library.cpp:45:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < ans.size(); i++) ans[i]++;
                 ~~^~~~~~~~~~~~

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