Submission #674274

#	Time	Username	Problem	Language	Result	Execution time	Memory
674274		rainboy	Minerals (JOI19_minerals)	C++17	75 / 100	31 ms	2540 KiB

minerals

#include "minerals.h"

const int N = 43000, L = 16;

int k;

int Query_(int i) {
	int k_ = Query(i + 1);
	if (k_ == k)
		return 0;
	k = k_;
	return 1;
}

int tt[N * 2], ii[2][N], ii_[1 << L], nn[2], aa[N], bb[N];

void Solve(int n) {
	k = 0;
	for (int i = 0; i < n * 2; i++) {
		tt[i] = !Query_(i);
		ii[tt[i]][nn[tt[i]]++] = i;
	}
	for (int i = 0; i < n; i++) {
		int a = 0, c = 1;
		for (int l = 0; l < L; l++) {
			if ((i & 1 << l) != 0)
				c ^= 1;
			if (c)
				a |= 1 << l;
		}
		aa[i] = a;
	}
	for (int l = 0; l < L; l++) {
		for (int i = 0; i < n; i++)
			if ((aa[i] >> l & 1) != (l == 0 ? 1 : (aa[i] >> l - 1 & 1)))
				Query_(ii[0][i]);
		for (int i = 0; i < n; i++)
			if (!Query_(ii[1][i]))
				bb[i] |= 1 << l;
	}
	for (int i = 0; i < n; i++)
		ii_[aa[i]] = ii[0][i];
	for (int i = 0; i < n; i++)
		Answer(ii_[bb[i]] + 1, ii[1][i] + 1);
}

Compilation message (stderr)

minerals.cpp: In function 'void Solve(int)':
minerals.cpp:35:54: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   35 |    if ((aa[i] >> l & 1) != (l == 0 ? 1 : (aa[i] >> l - 1 & 1)))
      |                                                    ~~^~~

• Subtask 1: 6 / 6
• Subtask 2: 25 / 25
• Subtask 3: 9 / 9
• Subtask 4: 30 / 30
• Subtask 5: 5 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 10