Submission #1287205

#	Time	Username	Problem	Language	Result	Execution time	Memory
1287205		kaiboy	Sandcastle 2 (JOI22_ho_t5)	C++20	10 / 100	5093 ms	576 KiB

Main

#include <algorithm>
#include <iostream>

using namespace std;

const int     N = 50000;
const int ddi[] = { -1, 1, 0, 0 };
const int ddj[] = { 0, 0, -1, 1 };

int *aa[N];

int main() {
	ios_base::sync_with_stdio(false), cin.tie(NULL);
	int n, m; cin >> n >> m;
	for (int i = 0; i < n; i++) {
		aa[i] = new int[m];
		for (int j = 0; j < m; j++)
			cin >> aa[i][j];
	}
	int ans = 0;
	for (int il = 0; il < n; il++)
		for (int ir = il; ir < n; ir++)
			for (int jl = 0; jl < m; jl++)
				for (int jr = jl; jr < m; jr++) {
					int i_ = il, j_ = jl;
					for (int i = il; i <= ir; i++)
						for (int j = jl; j <= jr; j++)
							if (aa[i_][j_] < aa[i][j])
								i_ = i, j_ = j;
					int k = 0;
					for (int i = i_, j = j_; ; ) {
						k++, i_ = -1, j_ = -1;
						for (int h = 0; h < 4; h++) {
							int ih = i + ddi[h], jh = j + ddj[h];
							if (il <= ih && ih <= ir
									&& jl <= jh && jh <= jr
									&& aa[ih][jh] < aa[i][j]
									&& (i_ == -1 || aa[i_][j_] < aa[ih][jh]))
								i_ = ih, j_ = jh;
						}
						if (i_ == -1 || aa[i][j] < aa[i_][j_])
							break;
						i = i_, j = j_;
					}
					if (k == (ir - il + 1) * (jr - jl + 1))
						ans++;
				}
	cout << ans << '\n';
	return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 10 / 10
• Subtask 3: 0 / 5
• Subtask 4: 0 / 56
• Subtask 5: 0 / 20