Submission #608797

#	Time	Username	Problem	Language	Result	Execution time	Memory
608797		Hanksburger	Rectangles (IOI19_rect)	C++17	27 / 100	573 ms	68580 KiB

rect

#include "rect.h"
#include <bits/stdc++.h>
using namespace std;
bool u[205][205][205], d[205][205][205], l[205][205][205], r[205][205][205], ud[205][205][205], lr[205][205][205];
long long count_rectangles(vector<vector<int> > a)
{
    int n=a.size(), m=a[0].size();
    for (int i=1; i<=n-2; i++)
    {
        for (int j=i; j<=n-2; j++)
        {
            for (int k=1; k<=m-2; k++)
            {
                if (i==j)
                    u[i][j][k]=(a[j][k]<a[i-1][k]);
                else
                    u[i][j][k]=u[i][j-1][k]&(a[j][k]<a[i-1][k]);
            }
        }
    }
    for (int j=1; j<=n-2; j++)
    {
        for (int i=j; i>=1; i--)
        {
            for (int k=1; k<=m-2; k++)
            {
                if (i==j)
                    d[i][j][k]=(a[i][k]<a[j+1][k]);
                else
                    d[i][j][k]=d[i+1][j][k]&(a[i][k]<a[j+1][k]);
                ud[i][j][k]=u[i][j][k]&d[i][j][k];
            }
        }
    }
    for (int i=1; i<=m-2; i++)
    {
        for (int j=i; j<=m-2; j++)
        {
            for (int k=1; k<=n-2; k++)
            {
                if (i==j)
                    l[i][j][k]=(a[k][j]<a[k][i-1]);
                else
                    l[i][j][k]=l[i][j-1][k]&(a[k][j]<a[k][i-1]);
            }
        }
    }
    for (int j=1; j<=m-2; j++)
    {
        for (int i=j; i>=1; i--)
        {
            for (int k=1; k<=n-2; k++)
            {
                if (i==j)
                    r[i][j][k]=(a[k][i]<a[k][j+1]);
                else
                    r[i][j][k]=r[i+1][j][k]&(a[k][i]<a[k][j+1]);
                lr[i][j][k]=l[i][j][k]&r[i][j][k];
            }
        }
    }
    int ans=0;
    for (int i=1; i<=n-2; i++)
    {
        for (int j=i; j<=n-2; j++)
        {
            int L;
            for (int k=1; k<m; k++)
            {
                if (!ud[i][j][k-1] && ud[i][j][k])
                    L=k;
                else if (ud[i][j][k-1] && !ud[i][j][k])
                {
                    int R=k-1;
                    for (int p=L; p<=R; p++)
                    {
                        for (int q=p; q<=R; q++)
                        {
                            bool ok=1;
                            for (int r=i; r<=j; r++)
                            {
                                if (!lr[p][q][r])
                                {
                                    ok=0;
                                    break;
                                }
                            }
                            ans+=ok;
                        }
                    }
                }
            }
        }
    }
    return ans;
}

Compilation message (stderr)

rect.cpp: In function 'long long int count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:67:17: warning: 'L' may be used uninitialized in this function [-Wmaybe-uninitialized]
   67 |             int L;
      |                 ^

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