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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#750670#7781. Sheep Eat Wolveszhenghanyun#WA 0ms3660kbC++141.6kb2024-11-15 15:24:572024-11-15 15:24:58

Judging History

你现在查看的是最新测评结果

  • [2024-11-15 15:24:58]
  • 评测
  • 测评结果:WA
  • 用时:0ms
  • 内存:3660kb
  • [2024-11-15 15:24:57]
  • 提交

answer

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

typedef long long ll;

const int N = 105;

struct node {
	int x, y, flg;

	node() {}
	node(int x, int y, int flg): x(x), y(y), flg(flg) {}
};

int x, y, p, q, ans = 1e9, f[N][N][2];

bitset <N> vis[N][2];

queue <node> Q;

inline void bfs(node s) {
	Q.push(s);
	vis[s.x][s.y][s.flg] = 1;
	while (!Q.empty()) {
		node u = Q.front();
		Q.pop();
		if (u.flg == 0) {
			int s = x - u.x, t = y - u.y;
			if (s && s + q < t) {
				continue;
			}
		} else {
			int s = u.x, t = u.y;
			if (s && s + q < t) {
				continue;
			}
		}
		int d = f[u.x][u.y][u.flg];
		if (u.x == 0) {
			ans = d;
			break;
		}
		if (u.flg == 0) {
			for (int i = 0; i <= u.x; ++i) {
				for (int j = 0; j <= u.y && i + j <= p; ++j) {
					int nx = u.x - i, ny = u.y - j;
					if (!vis[nx][ny][1]) {
						Q.push(node(nx, ny, 1));
						vis[nx][ny][1] = 1;
						f[nx][ny][1] = d + 1;
					}
				}
			}
		} else {
			for (int i = 0; i <= x - u.x; ++i) {
				for (int j = 0; j <= y - u.y && i + j <= p; ++j) {
					int nx = u.x + i, ny = u.y + j;
					if (!vis[nx][ny][0]) {
						Q.push(node(nx, ny, 0));
						vis[nx][ny][0] = 1;
						f[nx][ny][0] = d + 1;
					}
				}
			}
		}
	}
}

int main() {
	#ifdef LOCAL
		assert(freopen("test.in", "r", stdin));
		assert(freopen("test.out", "w", stdout));
	#endif
	ios::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
	cin >> x >> y >> p >> q;
	bfs(node(x, y, 0));
	if (ans == 1e9) {
		cout << "-1\n";
	} else {
		cout << ans << "\n";
	}
	return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 0ms
memory: 3560kb

input:

4 4 3 1

output:

3

result:

ok 1 number(s): "3"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3660kb

input:

3 5 2 0

output:

5

result:

ok 1 number(s): "5"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3640kb

input:

2 5 1 1

output:

-1

result:

ok 1 number(s): "-1"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3616kb

input:

1 1 1 0

output:

1

result:

ok 1 number(s): "1"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3624kb

input:

3 3 1 1

output:

7

result:

ok 1 number(s): "7"

Test #6:

score: 0
Accepted
time: 0ms
memory: 3556kb

input:

3 3 2 1

output:

3

result:

ok 1 number(s): "3"

Test #7:

score: 0
Accepted
time: 0ms
memory: 3580kb

input:

10 9 1 10

output:

19

result:

ok 1 number(s): "19"

Test #8:

score: 0
Accepted
time: 0ms
memory: 3548kb

input:

15 20 2 5

output:

27

result:

ok 1 number(s): "27"

Test #9:

score: -100
Wrong Answer
time: 0ms
memory: 3572kb

input:

18 40 16 7

output:

-1

result:

wrong answer 1st numbers differ - expected: '5', found: '-1'