Submission #538116

#	Time	Username	Problem	Language	Result	Execution time	Memory
538116		huangqr	도서관 (JOI18_library)	C++14	100 / 100	463 ms	440 KiB

library

#include <cstdio>
#include <vector>
#include "library.h"

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;

void Solve(int N)
{
	if(N==1){
		vector<int>ans={1};
		Answer(ans);
		return;
	}
	vector<int>M(N,1);
	vector<int>ans;
	vector<int>unknown;
	for(int i=1;i<=N;i++)unknown.push_back(i);
	for(int i=0;i<N;i++){//Locating an edge, letting it be L
		M[i]=0;
		if(Query(M)==1){
			ans.push_back(i+1);
			unknown.erase(remove(unknown.begin(),unknown.end(),i+1),unknown.end());
			break;
		}
		M[i]=1;
	}
	while((int)ans.size()<N){
		vector<int>space=unknown,a,b;
		while(space.size()>1){
			int halfsize=space.size()/2;
			for(int i=0;i<halfsize;i++){
				a.push_back(space[i]);
			}
			for(int i=halfsize;i<(int)space.size();i++){
				b.push_back(space[i]);
			}
			//assert(a.size()&&b.size());
			fill(M.begin(),M.end(),0);
			for(auto x:a)M[x-1]=1;
			int pre = Query(M);
			M[ans.back()-1]=1;
			int aft = Query(M);
			if(pre==aft)space=a;
			else space=b;
			a.clear();
			b.clear();
		}
		ans.push_back(*(space.begin()));
		unknown.erase(remove(unknown.begin(),unknown.end(),*(space.begin())),unknown.end());
	}
	assert(ans.size()==N);
	Answer(ans);
}

Compilation message (stderr)

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from library.cpp:5:
library.cpp: In function 'void Solve(int)':
library.cpp:53:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   53 |  assert(ans.size()==N);
      |         ~~~~~~~~~~^~~

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