Submission #550588

#	Time	Username	Problem	Language	Result	Execution time	Memory
550588		Pherokung	Library (JOI18_library)	C++14	100 / 100	494 ms	424 KiB

library

#include <cstdio>
#include <vector>
#include "library.h"
#include<bits/stdc++.h>
using namespace std;
int st=0,vis[1005];
void Solve(int n){
	vector<int> res;
	if(n == 1){
		res.push_back(1);
		Answer(res);
		return;
	}
	vector<int> M(n), K, K2;
	
	K = M; 
	for(int i=1;i<=n;i++) K[i-1] = 1;
	for(int i=1;i<=n;i++){
		K[i-1] = 0;
		if(Query(K) == 1){
			st = i;
			break;
		}
		K[i-1] = 1;
	}
	
	int pos = st,pre = -1;
	for(int i=1;i<=n;i++){
		res.push_back(pos);
		vis[pos] = 1;
		
		int be = 1,ed = n-i, mid, mi = 1e9, keep = pos;

		while(be <= ed){
			mid = (be+ed)/2;
			K = M;
			int cnt = 0;
			for(int j=1;j<=n;j++) if(vis[j] == 0 && cnt < mid) K[j-1] = 1, cnt++;
			K2 = K;
			K[pos-1] = 1, K2[pos-1] = 0;
			int A,B;
			if(K2 == M) A = 0, B = 1;
			else A = Query(K2), B = Query(K);
			if(B == A){
				ed = mid - 1;
				mi = min(mi,mid);
			}
			else be = mid + 1;
		}
		int cnt = 0;
		for(int j=1;j<=n;j++) if(vis[j] == 0 && cnt < mi) pos = j,cnt++;
		pre = keep;
	}
	
	Answer(res);
}

Compilation message (stderr)

library.cpp: In function 'void Solve(int)':
library.cpp:27:15: warning: variable 'pre' set but not used [-Wunused-but-set-variable]
   27 |  int pos = st,pre = -1;
      |               ^~~

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