Submission #114784

#	Time	Username	Problem	Language	Result	Execution time	Memory
114784		maruii	Library (JOI18_library)	C++14	100 / 100	526 ms	384 KiB

library

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

void Solve(int N)
{
	vector<int> vec(N), res(N);
	for (int i = 0, pre; i < N; ++i) {
		int l = 0, r = N - 1;
		while (l < r) {
			int m = l + r >> 1;
			int t, a, b;
			vector<int> v = vec;
			fill(v.begin() + l, v.begin() + m + 1, 1);
			a = Query(v);
			if (i == 0) {
				for (auto &j: v) j ^= 1;
				if (accumulate(v.begin(), v.end(), 0)) b = Query(v);
				else b = 0;
				t = a >= b;
			}
			else {
				v[pre] = 0;
				if (accumulate(v.begin(), v.end(), 0)) b = Query(v);
				else b = 0;
				if (i == 1) t = a == b;
				else t = a < b;
			}
			if (t) r = m;
			else l = m + 1;
		}
		vec[l] = 1;
		pre = l;
		res[i] = l + 1;
	}
	Answer(res);
}

Compilation message (stderr)

library.cpp: In function 'void Solve(int)':
library.cpp:11:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    int m = l + r >> 1;
            ~~^~~
library.cpp:23:10: warning: 'pre' may be used uninitialized in this function [-Wmaybe-uninitialized]
     v[pre] = 0;
          ^

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