oj.uz

Submission #1008611

# Submission time Handle Problem Language Result Execution time Memory
1008611 2024-06-26T15:44:05 Z PagodePaiva Rectangles (IOI19_rect) C++17
72 / 100
 5000 ms 495832 KB 
#include "rect.h"
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define int int16_t

using namespace std;

const int N = 2510;
const int inf = N;
int32_t v[N][N];
int p1[N][N];
int p2[N][N];
int p3[N][N];
int p4[N][N];

struct Segtree{
	int tree[4*N];
	int join(int a, int b){
		return min(a, b);
	}
	void build(int node, int l, int r){
		if(l == r){
			tree[node] = inf;
			return;
		}
		int mid = (l+r)/2;
		build(2*node, l, mid);
		build(2*node+1, mid+1, r);
		tree[node] = join(tree[2*node], tree[2*node+1]);
		return;
	}	
	void update(int node, int l, int r, int pos, int val){
		if(l == r){
			tree[node] = val;
			return;
		}
		int mid = (l+r)/2;
		if(l <= pos and pos <= mid) update(2*node, l, mid, pos, val);
		else update(2*node+1, mid+1, r, pos, val);
		tree[node] = join(tree[2*node], tree[2*node+1]);
		return;
	}
	int query(int node, int l, int r, int tl, int tr){
		if(l <= tl and tr <= r) return tree[node];
		if(l > tr or tl > r) return inf;
		int mid = (tl+tr)/2;
		return join(query(2*node, l, r, tl, mid), query(2*node+1, l, r, mid+1, tr));
	}
} seg1[N], seg3[N];

struct Segtree2{
	int tree[4*N];
	int join(int a, int b){
		return max(a, b);
	}
	void build(int node, int l, int r){
		if(l == r){
			tree[node] = -1;
			return;
		}
		int mid = (l+r)/2;
		build(2*node, l, mid);
		build(2*node+1, mid+1, r);
		tree[node] = join(tree[2*node], tree[2*node+1]);
		return;
	}	
	void update(int node, int l, int r, int pos, int val){
		if(l == r){
			tree[node] = val;
			return;
		}
		int mid = (l+r)/2;
		if(l <= pos and pos <= mid) update(2*node, l, mid, pos, val);
		else update(2*node+1, mid+1, r, pos, val);
		tree[node] = join(tree[2*node], tree[2*node+1]);
		return;
	}
	int query(int node, int l, int r, int tl, int tr){
		if(l <= tl and tr <= r) return tree[node];
		if(l > tr or tl > r) return -1;
		int mid = (tl+tr)/2;
		return join(query(2*node, l, r, tl, mid), query(2*node+1, l, r, mid+1, tr));
	}
} seg2[N], seg4[N];

set <array <int, 4>> s;
int n, m;

bool check(int r1, int c1, int r2, int c2){
	if(r1 == 0 or r2 == n+1 or r2-r1 <= 1) return false;
	if(c1 == 0 or c2 == m+1 or c2-c1 <= 1) return false;
	if(r1+1 > r2-1 or c1+1 > c2-1) return false;
	if(c1 <= 0 or c1 > m or c2 <= 0 or c2 > m or r1 <= 0 or r1 > n or r2 <= 0 or r2 > n) return false;
	int x1 = seg1[c1].query(1,r1+1, r2-1, 1, n);
	if(c1+1 <= x1 and x1 <= c2-1) return false;
	x1 = seg2[c2].query(1, r1+1, r2-1, 1, n);
	if(c1 < x1 and x1 < c2) return false;
	int x2 = seg3[r1].query(1, c1+1, c2-1, 1, m);
	if(r1 < x2 and x2 < r2) return false;
	x2 = seg4[r2].query(1, c1+1, c2-1, 1, m);
	if(r1 < x2 and x2 < r2) return false;
	if(s.find({r1, c1, r2, c2}) != s.end()) return false;
	s.insert({r1, c1, r2, c2});
	return true;
}
long long count_rectangles(std::vector<std::vector<int32_t> > a) {
	n = a.size(), m = a[0].size();
	s.clear();
	for(int i = 1;i <= n;i++){
		for(int j = 1;j <= m;j++){
			v[i][j] = a[i-1][j-1];
		}
	}
	for(int i = 1;i <= n;i++){
		stack <int> s;
		for(int j = 1;j <= m;j++){
			if(s.empty()) s.push(j);
			else{
				while(!s.empty()){
					int t = s.top();
					if(v[i][j] >= v[i][t]){
						p1[i][t] = j;
						s.pop();
					}
					else{
						break;
					}
				}
				s.push(j);
			}
		}
		while(!s.empty()){
			int t = s.top();
			p1[i][t] = m+1;
			s.pop();
		}
	}
	for(int i = 1;i <= n;i++){
		stack <int> s;
		for(int j = m;j > 0;j--){
			if(s.empty()) s.push(j);
			else{
				while(!s.empty()){
					int t = s.top();
					if(v[i][j] >= v[i][t]){
						p2[i][t] = j;
						s.pop();
					}
					else{
						break;
					}
				}
				s.push(j);
			}
		}
		while(!s.empty()){
			int t = s.top();
			p2[i][t] = 0;
			s.pop();
		}
	}
	for(int j = 1;j <= m;j++){
		stack <int> s;
		for(int i = 1;i <= n;i++){
			if(s.empty()) s.push(i);
			else{
				while(!s.empty()){
					int t = s.top();
					if(v[i][j] >= v[t][j]){
						p3[t][j] = i;
						s.pop();
					}
					else{
						break;
					}
				}
				s.push(i);
			}
		}
		while(!s.empty()){
			int t = s.top();
			p3[t][j] = n+1;
			s.pop();
		}
	}
	for(int j = 1;j <= m;j++){
		stack <int> s;
		for(int i = n;i > 0;i--){
			if(s.empty()) s.push(i);
			else{
				while(!s.empty()){
					int t = s.top();
					if(v[i][j] >= v[t][j]){
						p4[t][j] = i;
						s.pop();
					}
					else{
						break;
					}
				}
				s.push(i);
			}
		}
		while(!s.empty()){
			int t = s.top();
			p4[t][j] = 0;
			s.pop();
		}
	}
	for(int i = 1;i <= m;i++){
		seg1[i].build(1, 1, n);
		seg2[i].build(1, 1, n);
	}
	for(int i = 1;i <= n;i++){
		seg3[i].build(1, 1, m);
		seg4[i].build(1, 1, m);
	}
	for(int i = 1;i <= n;i++){
		for(int j = 1;j <= m;j++){
			seg1[j].update(1, 1, n, i, p1[i][j]);
			seg2[j].update(1, 1, n, i, p2[i][j]);
			seg3[i].update(1, 1, m, j, p3[i][j]);
			seg4[i].update(1, 1, m, j, p4[i][j]);
		}
	}
	for(int r1 = 1;r1 < n;r1++){
		for(int c1 = 1;c1 < m;c1++){
			int r2 = p3[r1][c1+1];
			int c2 = (1 <= r1+1 and r1+1 <= r2-1 and r2-1 <= n ? seg1[c1].query(1, r1+1, r2-1, 1, n) : -1);
			check(r1, c1, r2, c2);
			c2 = p1[r1+1][c1];
			r2 = (1 <= c1+1 and c1+1 <= c2-1 and c2-1 <= m ? seg3[r1].query(1, c1+1, c2-1, 1, m) : -1);
			check(r1, c1, r2, c2);
		}
	}
	for(int r1 = 1;r1 < n;r1++){
		for(int c2 = m;c2 > 1;c2--){
			int c1 = p2[r1+1][c2];
			int r2 = (1 <= c1+1 and c1+1 <= c2-1 and c2-1 <= m ? seg3[r1].query(1, c1+1, c2-1, 1, m) : -1);
			check(r1, c1, r2, c2);
			r2 = p3[r1][c2-1];
			c1 = (1 <= r1+1 and r1+1 <= r2-1 and r2-1 <= n ? seg2[c2].query(1, r1+1, r2-1, 1, n) : -1);
			check(r1, c1, r2, c2);
		}
	}
	for(int r2 = n;r2 > 1;r2--){
		for(int c1 = 1;c1 < m;c1++){
			int r1 = p4[r2][c1+1];
			int c2 = (1 <= r1+1 and r1+1 <= r2-1 and r2-1 <= n ? seg1[c1].query(1, r1+1, r2-1, 1, n) : -1);
			check(r1, c1, r2, c2);
			c2 = p1[r2-1][c1];
			r1 = (1 <= c1+1 and c1+1 <= c2-1 and c2-1 <= m ? seg4[r2].query(1, c1+1, c2-1, 1, m) : -1);
			check(r1, c1, r2, c2);
			/*
			int c2 = p1[r2-1][c1];
			int r1 = p4[r2][c1+1];
			check(r1, c1, r2, c2);
			*/
		}
	}
	for(int r2 = n;r2 > 1;r2--){
		for(int c2 = m;c2 > 1;c2--){
			int c1 = p2[r2-1][c2];
			int r1 = (1 <= c1+1 and c1+1 <= c2-1 and c2-1 <= m ? seg4[r2].query(1, c1+1, c2-1, 1, m) : -1);
			check(r1, c1, r2, c2);
			r1 = p4[r2][c2-1];
			c1 = (1 <= r1+1 and r1+1 <= r2-1 and r2-1 <= n ? seg2[c2].query(1, r1+1, r2-1, 1, n) : -1);
			check(r1, c1, r2, c2);
			/*
			int c1 = p2[r2-1][c2];
			int r1 = p4[r2][c2-1];
			check(r1, c1, r2, c2);
			*/
		}
	}
	return s.size();
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 1 ms 1628 KB Output is correct
4 Correct 1 ms 1628 KB Output is correct
5 Correct 1 ms 1372 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 1372 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 1372 KB Output is correct
10 Correct 1 ms 1372 KB Output is correct
11 Correct 1 ms 1368 KB Output is correct
12 Correct 1 ms 1372 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 1624 KB Output is correct
20 Correct 1 ms 1372 KB Output is correct
21 Correct 0 ms 604 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 1 ms 1628 KB Output is correct
4 Correct 1 ms 1628 KB Output is correct
5 Correct 1 ms 1372 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 1372 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 1372 KB Output is correct
10 Correct 1 ms 1372 KB Output is correct
11 Correct 1 ms 1368 KB Output is correct
12 Correct 1 ms 1372 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 1624 KB Output is correct
20 Correct 1 ms 1372 KB Output is correct
21 Correct 0 ms 604 KB Output is correct
22 Correct 7 ms 3928 KB Output is correct
23 Correct 6 ms 3932 KB Output is correct
24 Correct 6 ms 3932 KB Output is correct
25 Correct 4 ms 3676 KB Output is correct
26 Correct 6 ms 3560 KB Output is correct
27 Correct 6 ms 3676 KB Output is correct
28 Correct 5 ms 3768 KB Output is correct
29 Correct 3 ms 3164 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 1 ms 1628 KB Output is correct
4 Correct 1 ms 1628 KB Output is correct
5 Correct 1 ms 1372 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 1372 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 1372 KB Output is correct
10 Correct 1 ms 1372 KB Output is correct
11 Correct 1 ms 1368 KB Output is correct
12 Correct 1 ms 1372 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 7 ms 3928 KB Output is correct
18 Correct 6 ms 3932 KB Output is correct
19 Correct 6 ms 3932 KB Output is correct
20 Correct 4 ms 3676 KB Output is correct
21 Correct 6 ms 3560 KB Output is correct
22 Correct 6 ms 3676 KB Output is correct
23 Correct 5 ms 3768 KB Output is correct
24 Correct 3 ms 3164 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 1624 KB Output is correct
28 Correct 1 ms 1372 KB Output is correct
29 Correct 0 ms 604 KB Output is correct
30 Correct 42 ms 11308 KB Output is correct
31 Correct 42 ms 11092 KB Output is correct
32 Correct 54 ms 11384 KB Output is correct
33 Correct 24 ms 9408 KB Output is correct
34 Correct 34 ms 9812 KB Output is correct
35 Correct 35 ms 10172 KB Output is correct
36 Correct 33 ms 10076 KB Output is correct
37 Correct 34 ms 10108 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 1 ms 1628 KB Output is correct
4 Correct 1 ms 1628 KB Output is correct
5 Correct 1 ms 1372 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 1372 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 1372 KB Output is correct
10 Correct 1 ms 1372 KB Output is correct
11 Correct 1 ms 1368 KB Output is correct
12 Correct 1 ms 1372 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 7 ms 3928 KB Output is correct
18 Correct 6 ms 3932 KB Output is correct
19 Correct 6 ms 3932 KB Output is correct
20 Correct 4 ms 3676 KB Output is correct
21 Correct 6 ms 3560 KB Output is correct
22 Correct 6 ms 3676 KB Output is correct
23 Correct 5 ms 3768 KB Output is correct
24 Correct 3 ms 3164 KB Output is correct
25 Correct 42 ms 11308 KB Output is correct
26 Correct 42 ms 11092 KB Output is correct
27 Correct 54 ms 11384 KB Output is correct
28 Correct 24 ms 9408 KB Output is correct
29 Correct 34 ms 9812 KB Output is correct
30 Correct 35 ms 10172 KB Output is correct
31 Correct 33 ms 10076 KB Output is correct
32 Correct 34 ms 10108 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 1624 KB Output is correct
36 Correct 1 ms 1372 KB Output is correct
37 Correct 0 ms 604 KB Output is correct
38 Correct 242 ms 48208 KB Output is correct
39 Correct 261 ms 48272 KB Output is correct
40 Correct 226 ms 48180 KB Output is correct
41 Correct 270 ms 48392 KB Output is correct
42 Correct 738 ms 71252 KB Output is correct
43 Correct 719 ms 71248 KB Output is correct
44 Correct 730 ms 71480 KB Output is correct
45 Correct 700 ms 67924 KB Output is correct
46 Correct 291 ms 46932 KB Output is correct
47 Correct 359 ms 48268 KB Output is correct
48 Correct 502 ms 54628 KB Output is correct
49 Correct 504 ms 56912 KB Output is correct
50 Correct 241 ms 38892 KB Output is correct
51 Correct 228 ms 31312 KB Output is correct
52 Correct 495 ms 55732 KB Output is correct
53 Correct 420 ms 56656 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 21084 KB Output is correct
2 Correct 9 ms 17964 KB Output is correct
3 Correct 8 ms 20756 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 10 ms 20828 KB Output is correct
6 Correct 10 ms 21012 KB Output is correct
7 Correct 11 ms 20828 KB Output is correct
8 Correct 10 ms 20828 KB Output is correct
9 Correct 10 ms 20980 KB Output is correct
10 Correct 8 ms 20568 KB Output is correct
11 Correct 8 ms 20828 KB Output is correct

Subtask #6
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 1624 KB Output is correct
4 Correct 1 ms 1372 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 0 ms 600 KB Output is correct
7 Correct 1826 ms 174608 KB Output is correct
8 Correct 4168 ms 342492 KB Output is correct
9 Correct 4183 ms 343652 KB Output is correct
10 Correct 4318 ms 343704 KB Output is correct
11 Correct 932 ms 175596 KB Output is correct
12 Correct 2059 ms 322028 KB Output is correct
13 Correct 2067 ms 331792 KB Output is correct

Subtask #7
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 1628 KB Output is correct
3 Correct 1 ms 1628 KB Output is correct
4 Correct 1 ms 1628 KB Output is correct
5 Correct 1 ms 1372 KB Output is correct
6 Correct 1 ms 1372 KB Output is correct
7 Correct 1 ms 1372 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 1372 KB Output is correct
10 Correct 1 ms 1372 KB Output is correct
11 Correct 1 ms 1368 KB Output is correct
12 Correct 1 ms 1372 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 7 ms 3928 KB Output is correct
18 Correct 6 ms 3932 KB Output is correct
19 Correct 6 ms 3932 KB Output is correct
20 Correct 4 ms 3676 KB Output is correct
21 Correct 6 ms 3560 KB Output is correct
22 Correct 6 ms 3676 KB Output is correct
23 Correct 5 ms 3768 KB Output is correct
24 Correct 3 ms 3164 KB Output is correct
25 Correct 42 ms 11308 KB Output is correct
26 Correct 42 ms 11092 KB Output is correct
27 Correct 54 ms 11384 KB Output is correct
28 Correct 24 ms 9408 KB Output is correct
29 Correct 34 ms 9812 KB Output is correct
30 Correct 35 ms 10172 KB Output is correct
31 Correct 33 ms 10076 KB Output is correct
32 Correct 34 ms 10108 KB Output is correct
33 Correct 242 ms 48208 KB Output is correct
34 Correct 261 ms 48272 KB Output is correct
35 Correct 226 ms 48180 KB Output is correct
36 Correct 270 ms 48392 KB Output is correct
37 Correct 738 ms 71252 KB Output is correct
38 Correct 719 ms 71248 KB Output is correct
39 Correct 730 ms 71480 KB Output is correct
40 Correct 700 ms 67924 KB Output is correct
41 Correct 291 ms 46932 KB Output is correct
42 Correct 359 ms 48268 KB Output is correct
43 Correct 502 ms 54628 KB Output is correct
44 Correct 504 ms 56912 KB Output is correct
45 Correct 241 ms 38892 KB Output is correct
46 Correct 228 ms 31312 KB Output is correct
47 Correct 495 ms 55732 KB Output is correct
48 Correct 420 ms 56656 KB Output is correct
49 Correct 11 ms 21084 KB Output is correct
50 Correct 9 ms 17964 KB Output is correct
51 Correct 8 ms 20756 KB Output is correct
52 Correct 1 ms 344 KB Output is correct
53 Correct 10 ms 20828 KB Output is correct
54 Correct 10 ms 21012 KB Output is correct
55 Correct 11 ms 20828 KB Output is correct
56 Correct 10 ms 20828 KB Output is correct
57 Correct 10 ms 20980 KB Output is correct
58 Correct 8 ms 20568 KB Output is correct
59 Correct 8 ms 20828 KB Output is correct
60 Correct 0 ms 600 KB Output is correct
61 Correct 1826 ms 174608 KB Output is correct
62 Correct 4168 ms 342492 KB Output is correct
63 Correct 4183 ms 343652 KB Output is correct
64 Correct 4318 ms 343704 KB Output is correct
65 Correct 932 ms 175596 KB Output is correct
66 Correct 2059 ms 322028 KB Output is correct
67 Correct 2067 ms 331792 KB Output is correct
68 Correct 0 ms 348 KB Output is correct
69 Correct 0 ms 348 KB Output is correct
70 Correct 1 ms 1624 KB Output is correct
71 Correct 1 ms 1372 KB Output is correct
72 Correct 0 ms 604 KB Output is correct
73 Correct 3974 ms 365652 KB Output is correct
74 Correct 4077 ms 365728 KB Output is correct
75 Correct 3819 ms 365588 KB Output is correct
76 Correct 3442 ms 366192 KB Output is correct
77 Execution timed out 5068 ms 495832 KB Time limit exceeded
78 Halted 0 ms 0 KB -