Submission #685269

#	Time	Username	Problem	Language	Result	Execution time	Memory
685269		smartmonky	Luxury burrow (IZhO13_burrow)	C++14	100 / 100	1082 ms	16284 KiB

burrow

#include <bits/stdc++.h>
 
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define int long long
 
using namespace std;
const int N = 2e5 + 5;
 
main(){
	int n, m, k;
	cin >> n >> m >> k;
	vector < vector <int> >  v (n + 1, vector <int> (m + 1));
	for(int i = 1; i <= n; i++){
		for(int j = 1; j <= m; j++){
			cin >> v[i][j];
		}
	}
	int ans = 0;
	auto check = [&](int x){
			vector < vector <int> > p(n + 1, vector <int> (m + 1, 0));
			for(int i = 1; i <= n; i++){
				for(int j = 1; j <= m; j++){
					if(v[i][j] >= x)
					p[i][j] = 1 + p[i - 1][j];
				}
			}
			ans = 0;
			for(int i = 1; i <= n; i++){
				deque <int> q;
				for(int j = 1 ; j <= m; j++){
					int ind = j;
					while(!q.empty() && p[i][j] <= p[i][q.front()]){
						ans = max(ans, p[i][q.front()] * (j - q.front()));
						p[i][q.front()] = p[i][j];
						ind = min(ind, q.front());
						q.pop_front();
					}
					q.push_front(ind);
				}
				while(!q.empty()){
					ans = max(((m + 1) - q.front()) * p[i][q.front()], ans);
					q.pop_front();
				}
			}
			return (ans >= k);
	};
	int l = 0, r = 1e9;
	while(r - l > 1){
		int mid = (l + r) >> 1;
		if(check(mid)){
			l = mid;
		}else
			r = mid;
	}
	check(l);
	cout << l <<" " << ans;
}

Compilation message (stderr)

burrow.cpp:13:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   13 | main(){
      | ^~~~

• Subtask 1: 100 / 100