oj.uz

Submission #807386

# Submission time Handle Problem Language Result Execution time Memory
807386 2023-08-04T16:35:44 Z Benmath Rectangles (IOI19_rect) C++14
23 / 100
 782 ms 134988 KB 
#include "rect.h"
#include <cstdio>
#include <unistd.h>
#include <cassert>
#include <string>
#include<bits/stdc++.h>
using namespace std;
int treemax[10001];
int treemin[10001];
void updatemax(int node,int start,int end,int idx,int val){
if(start==end){
treemax[node]=val;
}else{
int mid=(start+end)/2;
if(start<=idx and idx<=mid){
updatemax(2*node,start,mid,idx,val);
}else{
updatemax(2*node+1,mid+1,end,idx,val);
}
 
treemax[node]=max(treemax[2*node],treemax[2*node+1]);
}
}
void updatemin(int node,int start,int end,int idx,int val){
if(start==end){
treemin[node]=val;
}else{
int mid=(start+end)/2;
if(start<=idx and idx<=mid){
updatemin(2*node,start,mid,idx,val);
}else{
updatemin(2*node+1,mid+1,end,idx,val);
}
 
treemin[node]=min(treemin[2*node],treemin[2*node+1]);
}
}
int querymax(int node,int start,int end,int l,int r){
if(l>end or r<start){
return 0;
}
if(l<=start and end<=r){
return treemax[node];
}
int mid=(start+end)/2;
return max(querymax(2*node,start,mid,l,r),querymax(2*node+1,mid+1,end,l,r));
}
int querymin(int node,int start,int end,int l,int r){
if(l>end or r<start){
return 1e9;
}
if(l<=start and end<=r){
return treemin[node];
}
int mid=(start+end)/2;
return min(querymin(2*node,start,mid,l,r),querymin(2*node+1,mid+1,end,l,r));
}
long long count_rectangles(std::vector<std::vector<int> > a) {
    int m=a[0].size();
    int n=a.size();
    
    if(n<=2 or m<=2){
        return 0;
    }
    if(n<=3){
    for(int i=0;i<m;i++){
        if(a[1][i]<a[0][i] and a[1][i]<a[2][i]){
            updatemin(1,0,m-1,i,1);
        }
        updatemax(1,0,m-1,i,a[1][i]);
    }
    int ans=0;
    for(int j=1;j<(m-1);j++){
        for(int k=j;k<(m-1);k++){
            int x=querymin(1,0,m-1,j,k);
            if(x==1){
                int y=querymax(1,0,m-1,j,k);
                if(y<a[1][j-1] and y<a[1][k+1]){
                    ans++;
                }
            }
        }
    }
    return ans;
    }else{
        int ans=0;
        int pref[m][n];
        int dolje[n][m];
        int desno[n][m];
        
        for(int i=0;i<n;i++){
            for(int j=m-1;j>=0;j--){
                if(a[i][j]==1){
                    desno[i][j]=j;
                }else{
                    if(j==(m-1)){
                        desno[i][j]=-1;
                    }else{
                        desno[i][j]=desno[i][j+1];
                    }
                }
            }
        }
        for(int j=0;j<m;j++){
            for(int i=n-1;i>=0;i--){
                if(a[i][j]==1){
                    dolje[i][j]=i;
                }else{
                    if(i==(n-1)){
                        dolje[i][j]=-1;
                    }else{
                        dolje[i][j]=dolje[i+1][j];
                    }
                }
            }
        }
        for(int j=0;j<m;j++){
            for(int i=0;i<n;i++){
                if(i==0){
                    pref[j][i]=a[i][j];
                }else{
                    pref[j][i]=pref[j][i-1]+a[i][j];
                }
            }
        }
        for(int i=1;i<(n-1);i++){
            for(int j=1;j<(m-1);j++){
                if(a[i-1][j]==1 and a[i][j]==0 and a[i][j-1]==1){
                    int t1=0;
                    int i1=dolje[i][j];
                    int j1=desno[i][j];
                    if(i1!=-1 and j1!=-1){
                    for(int k=i;k<dolje[i][j];k++){
                        for(int t=j;t<desno[i][j];t++){
                            if(a[k][t]!=0){
                                t1++;
                                break;
                            }
                            if(a[i-1][t]!=1 or a[i1][t]!=1){
                                t1++;
                                break;
                            }
                            if(a[k][j-1]!=1 or a[k][j1]!=1){
                                t1++;
                                break;
                            }
                        }
                    }
                    if(t1==0){
                        ans++;
                    }
                }
                }
            }
        }
        return ans;
    }
}

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 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 212 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 212 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 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 782 ms 480 KB Output is correct
2 Correct 585 ms 460 KB Output is correct
3 Correct 387 ms 404 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 395 ms 476 KB Output is correct
6 Correct 401 ms 480 KB Output is correct
7 Correct 383 ms 468 KB Output is correct
8 Correct 383 ms 468 KB Output is correct
9 Correct 383 ms 476 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct

Subtask #6
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 129 ms 62008 KB Output is correct
3 Correct 308 ms 134156 KB Output is correct
4 Correct 323 ms 134964 KB Output is correct
5 Correct 308 ms 134988 KB Output is correct
6 Correct 101 ms 66764 KB Output is correct
7 Correct 218 ms 126628 KB Output is correct
8 Correct 226 ms 134964 KB Output is correct
9 Correct 0 ms 308 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 304 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct

Subtask #7
0 / 28.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -