Submission #332374

#	Time	Username	Problem	Language	Result	Execution time	Memory
332374		nicholask	Rectangles (IOI19_rect)	C++14	37 / 100	5058 ms	86124 KiB

rect

#include "rect.h"
#include <bits/stdc++.h>
using namespace std;
bool satisfysub6(vector <vector <int> > a,int n,int m){
	for (int i=0; i<n; i++){
		for (int j=0; j<m; j++){
			if (a[i][j]!=0&&a[i][j]!=1) return 0;
		}
	}
	return 1;
}
long long count_rectangles(vector <vector <int> > a){
	int n=a.size(),m=a[0].size();
	long long ans=0;
	if (satisfysub6(a,n,m)){
		for (int r1=1; r1<=n-2; r1++){
			for (int c1=1; c1<=m-2; c1++){
				if (a[r1][c1]) continue;
				int r2=r1,c2=c1;
				while (r2<n-2&&!a[r2+1][c1]) r2++;
				while (c2<m-2&&!a[r1][c2+1]) c2++;
				for (int i=r1; i<=r2; i++){
					for (int j=c1; j<=c2; j++){
						if (a[i][j]) goto die1;
					}
				}
				for (int i=c1; i<=c2; i++){
					if (!a[r1-1][i]||!a[r2+1][i]) goto die1;
				}
				for (int i=r1; i<=r2; i++){
					if (!a[i][c1-1]||!a[i][c2+1]) goto die1;
				}
				ans++;
				die1:;
			}
		}
		return ans;
	}
	for (int r1=1; r1<=n-2; r1++){
		for (int r2=r1; r2<=n-2; r2++){
			for (int c1=1; c1<=m-2; c1++){
				for (int c2=c1; c2<=m-2; c2++){
					for (int i=r1; i<=r2; i++){
						for (int j=c1; j<=c2; j++){
							if (a[i][j]>=a[i][c1-1]||a[i][j]>=a[i][c2+1]||a[i][j]>=a[r1-1][j]||a[i][j]>=a[r2+1][j]) goto die;
						}
					}
					ans++;
					die:;
				}
			}
		}
	}
	return ans;
}

• Subtask 1: 8 / 8
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 0 / 22
• Subtask 5: 10 / 10
• Subtask 6: 0 / 13
• Subtask 7: 0 / 28