oj.uz

Submission #297667

# Submission time Handle Problem Language Result Execution time Memory
297667 2020-09-11T17:38:46 Z shayan_p Rectangles (IOI19_rect) C++17
50 / 100
 5000 ms 192504 KB 
#include<bits/stdc++.h>
#include "rect.h"

#define F first
#define S second
#define PB push_back
#define sz(s) (int(s.size()))
#define bit(n, k) (((n)>>(k))&1)

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

const int maxn = 2510;

vector<vector<int>> a;
int aftx[maxn][maxn], befx[maxn][maxn], afty[maxn][maxn], befy[maxn][maxn];
int n, m;

set< pair<pii, pii> > st;

bool ok(int LX, int RX, int LY, int RY){
    if(LX <= 0 || LY <= 0 || RX >= n-1 || RY >= m-1 || LX > RX || LY > RY)
	return 0;    
    bool ok = 1;
    for(int x = LX; x <= RX; x++){
	for(int y = LY; y <= RY; y++){
	    ok&= befx[x][y] >= LY - 1;
	    ok&= befy[x][y] >= LX - 1;
	    ok&= aftx[x][y] <= RY + 1;
	    ok&= afty[x][y] <= RX + 1;
	}
    }
    return ok;
}

ll count_rectangles(vector< vector<int> > a){
    ::a = a;
    n = sz(a);
    m = sz(a[0]);
    for(int i = 0; i < n; i++){
	for(int j = 0; j < m; j++){
	    befx[i][j] = j-1;
	    while(befx[i][j] >= 0 && a[i][befx[i][j]] <= a[i][j])
		befx[i][j] = befx[i][ befx[i][j] ];
	}
	for(int j = m-1; j >= 0; j--){
	    aftx[i][j] = j+1;
	    while(aftx[i][j] < m && a[i][aftx[i][j]] <= a[i][j])
		aftx[i][j] = aftx[i][ aftx[i][j] ];
	}
    }
    for(int j = 0; j < m; j++){
	for(int i = 0; i < n; i++){
	    befy[i][j] = i-1;
	    while(befy[i][j] >= 0 && a[befy[i][j]][j] <= a[i][j])
		befy[i][j] = befy[ befy[i][j] ][j];
	}
	for(int i = n-1; i >= 0; i--){
	    afty[i][j] = i+1;
	    while(afty[i][j] < n && a[afty[i][j]][j] <= a[i][j])
		afty[i][j] = afty[ afty[i][j] ][j];
	}	
    }
    
    ll ans = 0;
    for(int i = 0; i < n; i++){
	for(int j = 0; j < m; j++){
	    if(ok(befy[i][j] + 1, afty[i][j] - 1, befx[i][j] + 1, aftx[i][j] - 1)){
		st.insert( { {befy[i][j] + 1, afty[i][j] - 1} , {befx[i][j] + 1, aftx[i][j] - 1} } );
	    }
	}
    }
    return sz(st);
}

Compilation message

rect.cpp: In function 'll count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:67:8: warning: unused variable 'ans' [-Wunused-variable]
   67 |     ll ans = 0;
      |        ^~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 896 KB Output is correct
5 Correct 1 ms 896 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 1 ms 896 KB Output is correct
8 Correct 1 ms 640 KB Output is correct
9 Correct 1 ms 896 KB Output is correct
10 Correct 1 ms 896 KB Output is correct
11 Correct 1 ms 896 KB Output is correct
12 Correct 1 ms 896 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 1 ms 512 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 0 ms 384 KB Output is correct
19 Correct 2 ms 896 KB Output is correct
20 Correct 1 ms 768 KB Output is correct
21 Correct 1 ms 512 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 896 KB Output is correct
5 Correct 1 ms 896 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 1 ms 896 KB Output is correct
8 Correct 1 ms 640 KB Output is correct
9 Correct 1 ms 896 KB Output is correct
10 Correct 1 ms 896 KB Output is correct
11 Correct 1 ms 896 KB Output is correct
12 Correct 1 ms 896 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 1 ms 512 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 25 ms 2176 KB Output is correct
18 Correct 24 ms 2176 KB Output is correct
19 Correct 24 ms 2168 KB Output is correct
20 Correct 2 ms 1792 KB Output is correct
21 Correct 3 ms 1920 KB Output is correct
22 Correct 3 ms 1920 KB Output is correct
23 Correct 3 ms 1920 KB Output is correct
24 Correct 2 ms 1792 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 0 ms 384 KB Output is correct
27 Correct 2 ms 896 KB Output is correct
28 Correct 1 ms 768 KB Output is correct
29 Correct 1 ms 512 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 896 KB Output is correct
5 Correct 1 ms 896 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 1 ms 896 KB Output is correct
8 Correct 1 ms 640 KB Output is correct
9 Correct 1 ms 896 KB Output is correct
10 Correct 1 ms 896 KB Output is correct
11 Correct 1 ms 896 KB Output is correct
12 Correct 1 ms 896 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 1 ms 512 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 25 ms 2176 KB Output is correct
18 Correct 24 ms 2176 KB Output is correct
19 Correct 24 ms 2168 KB Output is correct
20 Correct 2 ms 1792 KB Output is correct
21 Correct 3 ms 1920 KB Output is correct
22 Correct 3 ms 1920 KB Output is correct
23 Correct 3 ms 1920 KB Output is correct
24 Correct 2 ms 1792 KB Output is correct
25 Correct 890 ms 7544 KB Output is correct
26 Correct 867 ms 7544 KB Output is correct
27 Correct 872 ms 7544 KB Output is correct
28 Correct 7 ms 4992 KB Output is correct
29 Correct 18 ms 5760 KB Output is correct
30 Correct 20 ms 5888 KB Output is correct
31 Correct 22 ms 5752 KB Output is correct
32 Correct 19 ms 5760 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 0 ms 384 KB Output is correct
35 Correct 2 ms 896 KB Output is correct
36 Correct 1 ms 768 KB Output is correct
37 Correct 1 ms 512 KB Output is correct

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 896 KB Output is correct
5 Correct 1 ms 896 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 1 ms 896 KB Output is correct
8 Correct 1 ms 640 KB Output is correct
9 Correct 1 ms 896 KB Output is correct
10 Correct 1 ms 896 KB Output is correct
11 Correct 1 ms 896 KB Output is correct
12 Correct 1 ms 896 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 1 ms 512 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 25 ms 2176 KB Output is correct
18 Correct 24 ms 2176 KB Output is correct
19 Correct 24 ms 2168 KB Output is correct
20 Correct 2 ms 1792 KB Output is correct
21 Correct 3 ms 1920 KB Output is correct
22 Correct 3 ms 1920 KB Output is correct
23 Correct 3 ms 1920 KB Output is correct
24 Correct 2 ms 1792 KB Output is correct
25 Correct 890 ms 7544 KB Output is correct
26 Correct 867 ms 7544 KB Output is correct
27 Correct 872 ms 7544 KB Output is correct
28 Correct 7 ms 4992 KB Output is correct
29 Correct 18 ms 5760 KB Output is correct
30 Correct 20 ms 5888 KB Output is correct
31 Correct 22 ms 5752 KB Output is correct
32 Correct 19 ms 5760 KB Output is correct
33 Correct 53 ms 27256 KB Output is correct
34 Correct 52 ms 26616 KB Output is correct
35 Correct 54 ms 26616 KB Output is correct
36 Correct 55 ms 26616 KB Output is correct
37 Execution timed out 5007 ms 27284 KB Time limit exceeded
38 Halted 0 ms 0 KB -

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 640 KB Output is correct
2 Correct 6 ms 640 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 640 KB Output is correct
6 Correct 1 ms 640 KB Output is correct
7 Correct 1 ms 640 KB Output is correct
8 Correct 1 ms 640 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 640 KB Output is correct

Subtask #6
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 366 ms 89820 KB Output is correct
3 Correct 781 ms 191488 KB Output is correct
4 Correct 842 ms 192504 KB Output is correct
5 Correct 792 ms 192376 KB Output is correct
6 Correct 242 ms 89848 KB Output is correct
7 Correct 463 ms 172064 KB Output is correct
8 Correct 487 ms 176632 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 2 ms 896 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 512 KB Output is correct

Subtask #7
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 896 KB Output is correct
5 Correct 1 ms 896 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 1 ms 896 KB Output is correct
8 Correct 1 ms 640 KB Output is correct
9 Correct 1 ms 896 KB Output is correct
10 Correct 1 ms 896 KB Output is correct
11 Correct 1 ms 896 KB Output is correct
12 Correct 1 ms 896 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 1 ms 512 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 25 ms 2176 KB Output is correct
18 Correct 24 ms 2176 KB Output is correct
19 Correct 24 ms 2168 KB Output is correct
20 Correct 2 ms 1792 KB Output is correct
21 Correct 3 ms 1920 KB Output is correct
22 Correct 3 ms 1920 KB Output is correct
23 Correct 3 ms 1920 KB Output is correct
24 Correct 2 ms 1792 KB Output is correct
25 Correct 890 ms 7544 KB Output is correct
26 Correct 867 ms 7544 KB Output is correct
27 Correct 872 ms 7544 KB Output is correct
28 Correct 7 ms 4992 KB Output is correct
29 Correct 18 ms 5760 KB Output is correct
30 Correct 20 ms 5888 KB Output is correct
31 Correct 22 ms 5752 KB Output is correct
32 Correct 19 ms 5760 KB Output is correct
33 Correct 53 ms 27256 KB Output is correct
34 Correct 52 ms 26616 KB Output is correct
35 Correct 54 ms 26616 KB Output is correct
36 Correct 55 ms 26616 KB Output is correct
37 Execution timed out 5007 ms 27284 KB Time limit exceeded
38 Halted 0 ms 0 KB -