Submission #674345

#	Time	Username	Problem	Language	Result	Execution time	Memory
674345		rainboy	Minerals (JOI19_minerals)	C++17	100 / 100	71 ms	8260 KiB

minerals

/* https://www.ioi-jp.org/camp/2019/2019-sp-tasks/day4/minerals-review.pdf */
#include "minerals.h"
#include <cstring>
 
const int N = 43000, L = 19;
 
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];
int aaa[L * 2 + 2][1 << L], nn_[L * 2 + 2], kk[1 << L];
 
void Solve(int n) {
	for (int i = 0; i < n * 2; i++) {
		tt[i] = !Query_(i);
		ii[tt[i]][nn[tt[i]]++] = i;
	}
	for (int a = 0; a < 1 << L; a++) {
		int k = 0, l_ = -1;
		for (int l = 0; l < L; l++)
			if ((a >> l & 1) != (l == 0 ? 0 : (a >> l - 1 & 1)))
				k++, l_ = l;
		int w = a == 0 ? 0 : k + l_ + 2;
		aaa[w][nn_[w]++] = a;
	}
	for (int i = 0, w = 0; i < n; i++) {
		while (nn_[w] == 0)
			w++;
		aa[i] = aaa[w][--nn_[w]];
	}
	for (int l = 0; l < L; l++) {
		for (int i = 0; i < n; i++)
			if ((aa[i] >> l & 1) != (l == 0 ? 0 : (aa[i] >> l - 1 & 1)))
				Query_(ii[0][i]);
		memset(kk, 0, (1 << L) * sizeof *kk);
		for (int i = 0; i < n; i++)
			kk[aa[i] & (1 << l + 1) - 1]++;
		for (int i = 0; i < n; i++) {
			if (kk[bb[i]] == 0 || kk[bb[i] | 1 << l] != 0 && Query_(ii[1][i]))
				bb[i] |= 1 << l;
			kk[bb[i]]--;
		}
	}
	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:28:46: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   28 |    if ((a >> l & 1) != (l == 0 ? 0 : (a >> l - 1 & 1)))
      |                                            ~~^~~
minerals.cpp:40:54: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   40 |    if ((aa[i] >> l & 1) != (l == 0 ? 0 : (aa[i] >> l - 1 & 1)))
      |                                                    ~~^~~
minerals.cpp:44:23: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   44 |    kk[aa[i] & (1 << l + 1) - 1]++;
      |                     ~~^~~
minerals.cpp:44:28: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   44 |    kk[aa[i] & (1 << l + 1) - 1]++;
      |               ~~~~~~~~~~~~~^~~
minerals.cpp:46:50: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   46 |    if (kk[bb[i]] == 0 || kk[bb[i] | 1 << l] != 0 && Query_(ii[1][i]))
      |                          ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~

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