제출 #250117

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
250117		shenxy	Minerals (JOI19_minerals)	C++14	85 / 100	46 ms	2548 KiB

minerals

#include "minerals.h"
#include <algorithm>
#include <vector>
using namespace std;
vector<int> firsts, ans;
int lquery = 0;
void recurse(vector<int> &v, int l, int r, bool has = true) {
	if (l != r) {
		int m = (l + r) / 2;
		for (int i = l; i <= m; ++i) lquery = Query(firsts[i]);
		vector<int> a, b;
		for (int i: v) {
			if (a.size() != m - l + 1 && b.size() != r - m) {
				int x = Query(i);
				if (has == (x != lquery)) a.push_back(i);
				else b.push_back(i);
				if (x != lquery) lquery = x;
			} else if (a.size() != m - l + 1) a.push_back(i);
			else b.push_back(i);
		}
		recurse(a, l, m, !has);
		recurse(b, m + 1, r, has);
	} else ans.push_back(v[0]);
}
void Solve(int N) {
	vector<int> duds;
	for (int i = 1; i <= 2 * N; ++i) {
		int x = Query(i);
		if (x != lquery) firsts.push_back(i), lquery = x;
		else duds.push_back(i);
	}
  	random_shuffle(firsts.begin(), firsts.end());
	recurse(duds, 0, N - 1);
	for (int i = 0; i < N; ++i) Answer(firsts[i], ans[i]);
}

컴파일 시 표준 에러 (stderr) 메시지

minerals.cpp: In function 'void recurse(std::vector<int>&, int, int, bool)':
minerals.cpp:13:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (a.size() != m - l + 1 && b.size() != r - m) {
        ~~~~~~~~~^~~~~~~~~~~~
minerals.cpp:13:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (a.size() != m - l + 1 && b.size() != r - m) {
                                 ~~~~~~~~~^~~~~~~~
minerals.cpp:18:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    } else if (a.size() != m - l + 1) a.push_back(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: 0 / 5
• Subtask 9: 0 / 10