Submission #502643

#	Time	Username	Problem	Language	Result	Execution time	Memory
502643		sidon	Minerals (JOI19_minerals)	C++17	40 / 100	29 ms	2424 KiB

minerals

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

const int LIM = 43e3;

int A[LIM], L, R = -1;

void extend(int lv, int rv) {
	while(lv < L) Query(A[--L]);
	while(rv > R) Query(A[++R]);
	while(lv > L) Query(A[L++]);
	while(rv < R) Query(A[R--]);
}

void dfs(int l, int r, vector<int> b) {
	assert(size(b) == r-l);

	if(l == r) return;
	if(l == r - 1) return Answer(A[l], b[0]);

	int m = (l + r) / 2;

	extend(l, m-1);

	vector<int> bL, bR;

	for(int &i : b) {
		if((int)size(bL) == m - l) bR.push_back(i);
		else if((int)size(bR) == r - m) bL.push_back(i);
		else
			(Query(i) == Query(i) ? bL : bR).push_back(i);
	}

	dfs(l, m, bL);
	dfs(m, r, bR);
}

void Solve(int N) {
	vector<int> b;

	for(int i = 1; i <= N * 2; ++i) {
		if(R == N - 1 || Query(i) < R + 2) {
			b.push_back(i);
			Query(i);
		} else A[++R] = i;
	}
	dfs(0, N, b);
}

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 minerals.cpp:2:
minerals.cpp: In function 'void dfs(int, int, std::vector<int>)':
minerals.cpp:17:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   17 |  assert(size(b) == r-l);
      |         ~~~~~~~~^~~~~~

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