Submission #340433

#	Time	Username	Problem	Language	Result	Execution time	Memory
340433		amunduzbaev	Luxury burrow (IZhO13_burrow)	C++14	100 / 100	1198 ms	18036 KiB

burrow

/** made by amunduzbaev **/
 
#include <bits/stdc++.h>
using namespace std;
 
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define ll long long
#define ld long double
#define pii pair<int, int>
#define pll pair<ll, ll>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define fastios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vll vector<ll>
#define vii vector<int>
#define vpii vector<pii>
#define vpll vector<pll>
#define cnt(a)__builtin_popcount(a)
template<class T> bool umin(T& a, const T& b) {return a > b? a = b, true:false;}
template<class T> bool umax(T& a, const T& b) {return a < b? a = b, true:false;}

const int N = 1e3+5;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);
int s, n, m, k, t, a[N][N];
int tmp[N][N];
int check(int mx){
	memset(tmp, 0, sizeof tmp);
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			if(a[i][j] >= mx) tmp[i][j] = 1;
		}
	}
	
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			if(tmp[i][j] && i) tmp[i][j] += tmp[i-1][j];
		}
	}
	int ans = 0;
	for(int i=0;i<n;i++){
		stack<pii> ss;
		vii l(m), r(m);
		
		for(int j=0;j<m;j++){
			if(tmp[i][j] == 0){
				while(!ss.empty()) ss.pop();
				continue;
			}
			int in = j;
			while(!ss.empty() && ss.top().ff >= tmp[i][j]) {in = ss.top().ss; ss.pop(); }
			
			l[j] = j - in+1;
			
			ss.push({tmp[i][j], in});
		}
		
		while(!ss.empty()) ss.pop();
		for(int j=m-1;j>=0;j--){
			if(tmp[i][j] == 0){
				while(!ss.empty()) ss.pop();
				continue;
			}
			
			int in = j;
			while(!ss.empty() && ss.top().ff >= tmp[i][j]) {in = ss.top().ss; ss.pop(); }
			
			r[j] = in - j+1;
			
			ss.push({tmp[i][j], in});
		}
		for(int j=0;j<m;j++) umax(ans, (r[j] + l[j] -1)*tmp[i][j]);
		
	}
	
	return ans;
}
 
void solve(){
	cin>>n>>m>>k;
	for(int i=0;i<n;i++)
		for(int j=0;j<m;j++) cin>>a[i][j];
	int l = 1, r = mod;
	while(l+1 < r){
		int m = (l + r) >>1;
		if(check(m) >= k) l = m;
		else r = m-1;
	}
	if(check(r) >= k) l = r;
	cout<<l<<" "<<check(l);
	return;
}
 
int main(){
	fastios
	int t = 1;
	if(t) solve();
	else {
		cin>>t;
		while (t--) solve();
	}
	return 0;
}

• Subtask 1: 100 / 100