Submission #1281693

#	Time	Username	Problem	Language	Result	Execution time	Memory
1281693		nicolo_010	Rectangles (IOI19_rect)	C++20	0 / 100	5095 ms	22680 KiB

rect

#include <bits/stdc++.h>
#include "rect.h"
using namespace std;
using ll = long long;
using pii = pair<int, int>;

int n, m;

bool valid(int x, int y) {
	if (x >= 0 && x<n && y >= 0 && y < m) return true;
	else return false;
}

struct SegTree {
	vector<int> tree;
	SegTree(int n) {
		tree.assign(4*n, 0);
	}
	void query(int p, int l, int r, int i, int x) {
		if (l > i || r < i) return;
		if (l==r && l==i) {
			tree[p] = x;
		}
		else {
			int m = (l+r)/2;
			query(2*p, l, m, i, x);
			query(2*p+1, m+1, r, i, x);
			tree[p] = max(tree[2*p], tree[2*p+1]);
		}
	}
	int rmq(int p, int l, int r, int i, int j) {
		if (l > j || r < i) return 0;
		if (i<=l && r <= j) {
			return tree[p];
		}
		int m = (l+r)/2;
		int i1 = rmq(2*p, l, m, i, j);
		int i2 = rmq(2*p+1, m+1, r, i, j);
		return max(i1, i2);
	}
};

ll count_rectangles(vector<vector<int>> a) {
	int n = a.size();
	int m = a.size();
	ll cnt=0;
	for (int i1=1; i1<n-1; i1++) {
		for (int j1=1; j1<m-1; j1++) {
			for (int i2=i1; i2<n-1; i2++) {
				for (int j2 = j1; j2<m-1; j2++) {
					bool can=true;
					for (int i=i1; i<=i2; i++) {
						for (int j=j1; j<=j2; j++) {
							if (a[i][j] < a[i1-1][j] && a[i][j] < a[i2+1][j] && a[i][j] < a[i][j1-1] && a[i][j] < a[i][j2+1]) {
								can = true;
							}
							else {
								can = false;
								break;
							}
						}
						if (!can) break;
					}
					if (can) cnt++;
				}
			}
		}
	}
	return cnt;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 22
• Subtask 5: 0 / 10
• Subtask 6: 0 / 13
• Subtask 7: 0 / 28