Submission #289027

#	Time	Username	Problem	Language	Result	Execution time	Memory
289027		phillip	Rectangles (IOI19_rect)	C++14	37 / 100	5048 ms	46840 KiB

rect

#include "rect.h"
#include <bits/stdc++.h>
#define ll long long
#define fast cin.tie(0);cout.tie(0);
#define order ios::sync_with_stdio(0);ios_base::sync_with_stdio(0);
#define pb push_back
using namespace std;
int n,m,a[2509][2509],mxx[1009][1009],my[2509],acx[1009][1009],acy[1009][1009];
int rec(int x,int y,int x2,int y2)
{
    if(acx[x2][y2]&&acy[x2][y2])return 1;
    return 0;
}
ll check(int x,int y)
{
    ll ret=0;
    for(int i=x;i<n-1;i++)
    {
        mxx[i][y-1]=0;
        for(int j=y;j<m-1;j++)
        {
            mxx[i][j]=max(mxx[i][j-1],a[i][j]);
            if(i==x)my[j]=a[i][j];
            else my[j]=max(my[j],a[i][j]);
            int mx=mxx[i][j];
            if(mx<a[i][j+1]&&mx<a[i][y-1])
            {
                if(i!=x)acx[i][j]=acx[i-1][j];
                else acx[i][j]=1;
            }
            else acx[i][j]=0;
            mx=my[j];
            if(mx<a[x-1][j]&&mx<a[i+1][j])
            {
                if(j==y)acy[i][j]=1;
                else acy[i][j]=acy[i][j-1];
            }
            else acy[i][j]=0;
            if(rec(x,y,i,j))ret++;
        }
    }
    return ret;
}
ll ans;
long long count_rectangles(std::vector<std::vector<int> > aa)
{
    n=aa.size();m=aa[0].size();
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<m;j++)a[i][j]=aa[i][j];
    }
    for(int i=1;i<n-1;i++)
    {
        for(int j=1;j<m-1;j++)
        {
            ans+=check(i,j);
        }
    }
    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