Submission #531718

#	Time	Username	Problem	Language	Result	Execution time	Memory
531718		errorgorn	Sandcastle 2 (JOI22_ho_t5)	C++17	15 / 100	5042 ms	1048580 KiB

Main

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define ll long long
#define ii pair<ll,ll>
#define fi first
#define se second

#define puf push_front
#define pof pop_front
#define pub push_back
#define pob pop_back
#define lb lower_bound
#define ub upper_bound

#define rep(x,s,e) for (auto x=(s)-((s)>(e));x!=(e)-((s)>(e));((s)<(e))?x++:x--)
#define all(x) (x).begin(),(x).end()
#define sz(x) (int) (x).size()

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

int n,m;
int arr[1500][1500];
vector<ii> idx;

int dist(ii i,ii j){
	return abs(i.fi-j.fi)+abs(i.se-j.se);
}

signed main(){
	cin.tie(0);
	cout.tie(0);
	cin.sync_with_stdio(false);
	
	cin>>n>>m;
	rep(x,0,n) rep(y,0,m){
		cin>>arr[x][y];
		idx.pub({x,y});
	}
	
	sort(all(idx),[](ii i,ii j){
		return arr[i.fi][i.se]<arr[j.fi][j.se];
	});
	
	int ans=0;
	rep(x1,0,n) rep(x2,x1,n) rep(y1,0,m) rep(y2,y1,m){
		ii p={-1,-1};
		bool ok=true;
		
		for (auto it:idx) if (x1<=it.fi && it.fi<=x2 && y1<=it.se && it.se<=y2){
			if (p!=ii(-1,-1) && dist(it,p)>1){
				ok=false;
				break;
			}
			p=it;
		}
		
		if (ok) ans++;
	}
	
	cout<<ans<<endl;
}

• Subtask 1: 0 / 9
• Subtask 2: 10 / 10
• Subtask 3: 5 / 5
• Subtask 4: 0 / 56
• Subtask 5: 0 / 20