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답안 #114941

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
114941 2019-06-04T04:43:55 Z jwvg0425 산악 구조대 (JOI13_mountain) C++17
0 / 100
 12 ms 896 KB 
#include <algorithm>
#include "grader.h"
#define xx first
#define yy second

using namespace std;
using ii = pair<int, int>;

int GetH(int R, int C, int RS, int CS, int D)
{
	int ans = 1000000001;

	if (D < 0)
		return ans;

	int ds[] = {
		RS + CS - 2,
		R - RS + CS - 1,
		R + C - RS - CS,
		RS - 1 + C - CS
	};

	int md = *max_element(ds, ds + 4);

	if (md == ds[0])
		if (RS > CS)
			return Measure(RS - (D + 1) / 2, CS - D / 2);
		else
			return Measure(RS - D / 2, CS - (D + 1) / 2);

	if (md == ds[1])
		if (R - RS > CS - 1)
			return Measure(RS + (D + 1) / 2, CS - D / 2);
		else
			return  Measure(RS + D / 2, CS - (D + 1)  / 2);

	if (md == ds[2])
		if (R - RS > C - CS)
			return Measure(RS + (D + 1) / 2, CS + D / 2);
		else
			return Measure(RS + D / 2, CS + (D + 1) / 2);

	if (RS - 1 > C - CS)
		return Measure(RS - (D + 1) / 2, CS + D / 2);
	else
		return Measure(RS - D / 2, CS + (D + 1) / 2);
}

bool Find(int R, int C, int RS, int CS, int D, int X)
{
	if (D == 0)
	{
		int h = Measure(RS, CS);

		if (h == X)
		{
			Pinpoint(RS, CS);
			return true;
		}

		return false;
	}

	int sx = RS - D, sy = CS;
	int dx[] = { 0, 1, 1, -1, -1 };
	int dy[] = { 0, 1, -1, -1, 1 };
	int di = 0;

	for(int i = 0; i < 4 * D; i++, sx += dx[di], sy += dy[di])
	{
		if (i % D == 0)
			di++;

		if (sx < 1 || sx > R || sy < 1 || sy > C)
			continue;

		int h = Measure(sx, sy);

		if (h == X)
		{
			Pinpoint(sx, sy);
			return true;
		}
	}

	return false;
}

void Rescue(int R, int C, int RS, int CS, int X) {
	// 모서리 4개, 가운데 4개로 max, min을 특정할 수 있다.
	// 속하는 영역을 이분 탐색으로 찾은 후 거기 밀기

	int l = 1, r = max(R - RS, RS - 1) + max(C - CS, CS - 1);
	int ans = r;

	while (l <= r)
	{
		int mid = (l + r) / 2;

		int nowMin = GetH(R, C, RS, CS, mid);
		int upMin = GetH(R, C, RS, CS, mid - 1);

		if (nowMin <= X && X <= upMin)
		{
			ans = mid;
			break;
		}

		if (nowMin < X)
			r = mid - 1;
		else
			l = mid + 1;
	}

	// ans거리에서 탐색
	if (!Find(R, C, RS, CS, ans, X))
		Find(R, C, RS, CS, ans - 1, X);
}

Compilation message

mountain.cpp: In function 'int GetH(int, int, int, int, int)':
mountain.cpp:25:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
  if (md == ds[0])
     ^
mountain.cpp:31:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
  if (md == ds[1])
     ^
mountain.cpp:37:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
  if (md == ds[2])
     ^

Subtask #1
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 4 ms 256 KB Output is correct
6 Correct 5 ms 360 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 256 KB Output is correct
12 Correct 4 ms 256 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 256 KB Output is correct
15 Correct 6 ms 404 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 256 KB Output is correct
18 Correct 5 ms 256 KB Output is correct
19 Correct 5 ms 256 KB Output is correct
20 Correct 5 ms 256 KB Output is correct
21 Correct 5 ms 360 KB Output is correct
22 Correct 5 ms 256 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 256 KB Output is correct
25 Correct 5 ms 432 KB Output is correct
26 Correct 5 ms 356 KB Output is correct
27 Correct 6 ms 256 KB Output is correct
28 Correct 5 ms 256 KB Output is correct
29 Correct 5 ms 256 KB Output is correct
30 Correct 5 ms 256 KB Output is correct
31 Correct 5 ms 256 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 5 ms 256 KB Output is correct
34 Correct 5 ms 436 KB Output is correct
35 Correct 5 ms 256 KB Output is correct
36 Correct 5 ms 256 KB Output is correct
37 Correct 5 ms 256 KB Output is correct
38 Correct 5 ms 256 KB Output is correct
39 Correct 5 ms 256 KB Output is correct
40 Correct 5 ms 384 KB Output is correct
41 Correct 5 ms 256 KB Output is correct
42 Correct 5 ms 384 KB Output is correct
43 Correct 5 ms 384 KB Output is correct
44 Correct 5 ms 256 KB Output is correct
45 Correct 5 ms 384 KB Output is correct
46 Correct 4 ms 256 KB Output is correct
47 Correct 5 ms 256 KB Output is correct
48 Correct 5 ms 256 KB Output is correct
49 Correct 4 ms 256 KB Output is correct
50 Correct 5 ms 384 KB Output is correct
51 Correct 4 ms 256 KB Output is correct
52 Correct 5 ms 304 KB Output is correct
53 Correct 5 ms 256 KB Output is correct
54 Correct 4 ms 256 KB Output is correct
55 Correct 5 ms 384 KB Output is correct
56 Incorrect 5 ms 256 KB Wrong Answer [5]
57 Halted 0 ms 0 KB -

Subtask #2
0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 12 ms 896 KB Wrong Answer [5]
2 Halted 0 ms 0 KB -