Submission #537992

#	Time	Username	Problem	Language	Result	Execution time	Memory
537992		GioChkhaidze	Luxury burrow (IZhO13_burrow)	C++14	100 / 100	394 ms	17932 KiB

burrow

#include <bits/stdc++.h>

#define f first
#define s second

using namespace std;

const int N = 1003;

int n, m, k, ans_c, ans_a, a[N][N], b[N][N];

bool check(int x) {
	for (int i = n; i >= 1; --i)
		for (int j = m; j >= 1; --j) 
			if (a[i][j] >= x) b[i][j] = b[i + 1][j] + 1;
				else b[i][j] = 0;

	int area = 0;
	deque < pair < int , int > > dq;
	for (int i = 1; i <= n; ++i) {
		for (int j = m; j >= 1; --j) {
			int id = j;
			while (dq.size() && dq.back().f >= b[i][j]) {	
				area = max(area, dq.back().f * (dq.back().s - j));
				id = dq.back().s;
				dq.pop_back();
			}
			area = max(area, b[i][j] * (id - j + 1));
			dq.push_back({b[i][j], id});
		}
		while (dq.size()) {
			area = max(area, dq.back().f * dq.back().s);
			dq.pop_back();
		}
	}		
			
	if (area >= k) {
		ans_c = x;
		ans_a = area;
		return true;
	}
	return false;
}

main () {
	ios::sync_with_stdio(false);
	cin.tie(NULL), cout.tie(NULL);
	cin >> n >> m >> k;
	for (int i = 1; i <= n; ++i)
		for (int j = 1; j <= m; ++j) 
			cin >> a[i][j];
	
	int l = 1, r = 1e9, mid;
	while (l <= r) {
		mid = ((l + r) >> 1);
		if (check(mid))
			l = mid + 1;
				else
			r = mid - 1;
	}
	cout << ans_c << " " << ans_a << "\n";
}

Compilation message (stderr)

burrow.cpp:45:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   45 | main () {
      | ^~~~

• Subtask 1: 100 / 100