oj.uz

Submission #1047622

# Submission time Handle Problem Language Result Execution time Memory
1047622 2024-08-07T14:29:02 Z vjudge1 Rectangles (IOI19_rect) C++17
0 / 100
 3 ms 604 KB 
#include "rect.h"

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

const int lim=3000;

struct{
	int tree[lim];
	void clear(){
		fill(tree,tree+lim,0);
	}
	void update(int p,int val){
		p++;
		while(p<lim){
			tree[p]+=val;
			p+=p&-p;
		}
	}
	int query(int p){
		p++;
		int ans=0;
		while(p){
			ans+=tree[p];
			p-=p&-p;
		}
		return ans;
	}
	int query(int l,int r){
		if(r<l)return 0;
		return query(r)-query(l-1);
	}
}fw;

long long count_rectangles(std::vector<std::vector<int> > a) {
	int n=a.size();
	int m=a[0].size();
	if(n==3){
		int l[m];
		stack<int>st;
		for(int i=0;i<m;i++){
			while(st.size()&&a[1][st.top()]<a[1][i]){
				st.pop();
			}
			if(st.size()){
				l[i]=st.top();
			}else{
				l[i]=0;
			}
			st.push(i);
		}
		int r[m];
		while(st.size())st.pop();
		for(int i=m-1;0<=i;i--){
			while(st.size()&&a[1][st.top()]<a[1][i]){
				st.pop();
			}
			if(st.size()){
				r[i]=st.top();
			}else{
				r[i]=m;
			}
			st.push(i);
		}
		vector<int>torem[m+5];
		long int ans=0;
		for(int i=0;i<m;i++){
			for(int j:torem[i]){
				//cerr<<"removed "<<j<<" at "<<i<<"\n";
				fw.update(j,-1);
			}
			if(1<i&&l[i]<=i-2){
				int k=fw.query(l[i],i-2);
				//cerr<<"queried "<<l[i]<<" "<<i-2<<"\n";
				//cerr<<k<<"\n";
				ans+=k;
			}
			if(a[1][i]>=a[0][i]||a[1][i]>=a[2][i]){
				//cerr<<"clear at "<<i<<"\n";
				fw.clear();
				for(int j=i;j<m;j++){
					torem[j].clear();
				}
			}
			fw.update(i,1);
			torem[r[i]+1].push_back(i);
		}
		return ans;
	}
	return -1;
}

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 3 ms 600 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 2 ms 604 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Incorrect 0 ms 348 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 28.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -