oj.uz

Submission #673579

# Submission time Handle Problem Language Result Execution time Memory
673579 2022-12-21T07:40:31 Z Baytoro Luxury burrow (IZhO13_burrow) C++17
100 / 100
 1036 ms 25760 KB 
#include <bits/stdc++.h>
using namespace std;
#define ios ios::sync_with_stdio(false); cin.tie(NULL);
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fr first
#define sc second
#define int long long
#define endl '\n'
void fopn(string name){
	freopen((name+".in").c_str(),"r",stdin);
	freopen((name+".out").c_str(),"w",stdout);
}
const int INF=1e18,mod=998244353;
int n,m,k;
int h[1005][1005],a[1005][1005];
int area=0;
int get_area(vector<int> vec){
	int N=vec.size();
	vec.resize(N+2);
	vector<int> l(N+2),r(N+2);
	vec[0]=vec[N+1]=-INF;
	stack<int> st;
	st.push(0);
	for(int i=1;i<=N;i++){
		while(vec[st.top()]>vec[i]) st.pop();
		l[i]=st.top();
		st.push(i);
	}
	while(!st.empty()) st.pop();
	st.push(N+1);
	for(int i=N;i>0;i--){
		while(vec[st.top()]>=vec[i]) st.pop();
		r[i]=st.top()-1;
		st.push(i);
	}
	int res=0;
	for(int i=1;i<=N;i++)
		res=max(res,(r[i]-l[i])*vec[i]);
	return res;
	
}
bool check(int md){
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			if(h[i][j]>=md)
				a[i][j]=1;
			else
				a[i][j]=0;
		}
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++)
			if(a[i][j])
				a[i][j]+=a[i-1][j];
	}
	area=0;
	for(int i=1;i<=n;i++){
		vector<int> v;
		v.pb(0);
		for(int j=1;j<=m+1;j++){
			v.pb(a[i][j]);
		}
		area=max(area,get_area(v));
	}
	if(area>=k) return 1;
	return 0;
}
void solve(){
	cin>>n>>m>>k;
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)
			cin>>h[i][j];
	int l=0,r=1e9;
	int ar=0,ans=0;
	while(r-l>1){
		//cout<<l<<' '<<r<<' ';
		int md=(l+r)/2;
		if(check(md)){
			l=md;
			ans=md,ar=area;
		}
		else
			r=md;
		//cout<<area<<endl;
	}
	cout<<ans<<' '<<ar<<endl;
}
main(){
	//fopn("newbarn");
	//ios;
	int T=1;
	//cin>>T;
	while(T--){
		solve();
	}
}

Compilation message

burrow.cpp:90:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   90 | main(){
      | ^~~~
burrow.cpp: In function 'void fopn(std::string)':
burrow.cpp:12:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
burrow.cpp:13:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 1 ms 316 KB Output is correct
8 Correct 9 ms 1236 KB Output is correct
9 Correct 17 ms 2388 KB Output is correct
10 Correct 42 ms 2772 KB Output is correct
11 Correct 81 ms 3772 KB Output is correct
12 Correct 41 ms 5260 KB Output is correct
13 Correct 52 ms 2340 KB Output is correct
14 Correct 116 ms 6620 KB Output is correct
15 Correct 119 ms 6584 KB Output is correct
16 Correct 149 ms 7056 KB Output is correct
17 Correct 149 ms 8700 KB Output is correct
18 Correct 334 ms 12552 KB Output is correct
19 Correct 382 ms 13200 KB Output is correct
20 Correct 745 ms 18488 KB Output is correct
21 Correct 702 ms 20748 KB Output is correct
22 Correct 1036 ms 25760 KB Output is correct
23 Correct 910 ms 25664 KB Output is correct
24 Correct 580 ms 18180 KB Output is correct
25 Correct 641 ms 18916 KB Output is correct