Submission #649607

#	Time	Username	Problem	Language	Result	Execution time	Memory
649607		PoonYaPat	도서관 (JOI18_library)	C++14	0 / 100	58 ms	208 KiB

library

#include <bits/stdc++.h>
#include "library.h"
using namespace std;

int query(vector<int> x) {
    bool check=false;
    for (int i=0; i<x.size(); ++i) if (x[i]) check=true;
    if (check) return Query(x);
    else return -1;
}

void Solve(int n) {
	int now=-1,pre=-1,ed;
	vector<int> test,ans;
	for (int i=0; i<n; ++i) test.push_back(1);
	for (int i=0; i<n; ++i) {
        test[i]=0;
        if (Query(test)==1) {
            if (now==-1) now=i;
            else ed=i;
        }
        test[i]=1;
	}
int cnt=0;
	ans.push_back(now+1);
	while (now!=ed) {
            ++cnt;
            assert(cnt<100000);
        int l=0, r=n-1;
        while (l<r) {
            int mid=(l+r)/2;
            for (int i=0; i<n; ++i) {
                if (i==pre) test[i]=0;
                else if (i>=mid+1 && i<=r) test[i]=1;
                else test[i]=0;
            }
            int k1=query(test);
            test[now]=1-test[now];
            int k2=query(test);

            if (k1==k2) l=mid+1;
            else r=mid;
        }
        ans.push_back(r+1);
        pre=now; now=r;
	}
	Answer(ans);
}

Compilation message (stderr)

library.cpp: In function 'int query(std::vector<int>)':
library.cpp:7:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |     for (int i=0; i<x.size(); ++i) if (x[i]) check=true;
      |                   ~^~~~~~~~~
library.cpp: In function 'void Solve(int)':
library.cpp:26:12: warning: 'ed' may be used uninitialized in this function [-Wmaybe-uninitialized]
   26 |  while (now!=ed) {
      |         ~~~^~~~

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