Submission #618698

#	Time	Username	Problem	Language	Result	Execution time	Memory
618698		chirathnirodha	Rectangles (IOI19_rect)	C++17	37 / 100	5056 ms	22732 KiB

rect

#include "rect.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;

long long count_rectangles(vector<vector<int> > a) {
	int n=a.size();
	int m=a[0].size();
	ll ans=0;

	for(int i=0;i<n;i++){
		int colmax[m];memset(colmax,-1,sizeof(colmax));
		bool colvalid[m];memset(colvalid,false,sizeof(colvalid));
		for(int j=i+2;j<n;j++){
			for(int k=0;k<m;k++){
				colmax[k]=max(colmax[k],a[j-1][k]);
				if(colmax[k]>=a[i][k] || colmax[k]>=a[j][k])colvalid[k]=false;
				else colvalid[k]=true;
			}
			for(int k=0;k<m;k++){
				int rowmax[n];memset(rowmax,-1,sizeof(rowmax));
				for(int l=k+2;l<m;l++){
					if(colvalid[l-1]==false)break;
					bool ok=true;
					for(int p=i+1;p<=j-1;p++){
						rowmax[p]=max(rowmax[p],a[p][l-1]);
						if(rowmax[p]>=a[p][k] || rowmax[p]>=a[p][l])ok=false;
					}
					if(ok)ans++;
				}
			}
		}
	}
	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