#include <iostream>
#include <vector>
#include <set>
#include <algorithm>
#include <stack>
#include <assert.h>
using namespace std;
const int n_max = 2550; // make it not lag
vector<pair<int,int>> h_map[n_max][n_max];
vector<pair<int,int>> v_map[n_max][n_max];
//vector<pair<int,int>> v_map2[n_max];
pair<int,int> tmp[n_max][n_max]; // start and end
void update_val(int left, int right, int row) {
if(tmp[left][right].second != row-1) {
if(tmp[left][right].second!=-2) {
for(int i=tmp[left][right].first; i<=tmp[left][right].second; i++) {
h_map[i][left].push_back(make_pair(tmp[left][right].second, right));
}
}
tmp[left][right] = make_pair(row, row);
} else {
tmp[left][right].second++;
}
}
void update_val2(int left, int right, int row) {
if(tmp[left][right].second != row-1) {
if(tmp[left][right].second!=-2) {
for(int i=tmp[left][right].first; i<=tmp[left][right].second; i++) {
v_map[left][i].push_back(make_pair(right, tmp[left][right].second));
}
}
tmp[left][right] = make_pair(row, row);
} else {
tmp[left][right].second++;
}
}
stack<int> s;
void gen_h_seg(vector<int> &x, int r) {
s.push(0);
for(int i=1; i<x.size(); i++) {
while(!s.empty() && x[s.top()]<x[i]) {
if(s.top()!=i-1) {
update_val(s.top()+1, i-1, r);
}
int t = x[s.top()];
while(!s.empty() && x[s.top()]==t) {
s.pop();
}
}
if(!s.empty() && s.top()!=i-1) {
update_val(s.top()+1, i-1, r);
}
s.push(i);
}
while(!s.empty()) s.pop();
}
int fwbit[n_max][n_max];
int fwa[n_max][n_max];
int fw_pt = 0;
struct fenwick {
int *BIT;
int *a;
int n;
fenwick(): n(n_max) {}
void reset() {
BIT = fwbit[fw_pt];
a = fwa[fw_pt];
fw_pt++;
}
void update(int x, int delta)
{
for(; x <= n; x += x&-x)
BIT[x] += delta;
}
int query(int x) {
int sum = 0;
for(; x > 0; x -= x&-x)
sum += BIT[x];
return sum;
}
};
void gen_v_seg(vector<int> &x, int r) {
s.push(0);
for(int i=1; i<x.size(); i++) {
while(!s.empty() && x[s.top()]<x[i]) {
if(s.top()!=i-1) {
update_val2(s.top()+1, i-1, r);
}
int t = x[s.top()];
while(!s.empty() && x[s.top()]==t) {
s.pop();
}
}
if(!s.empty() && s.top()!=i-1) {
update_val2(s.top()+1, i-1, r);
}
s.push(i);
}
while(!s.empty()) s.pop();
}
long long count_rectangles(vector<vector<int>> a) {
for(int i=0; i<n_max; i++) {
for(int j=0; j<n_max; j++) {
tmp[i][j] = make_pair(-2,-2);
}
}
for(int i=0; i<a.size(); i++) {
gen_h_seg(a[i],i);
}
for(int i=0; i<n_max; i++) {
for(int j=0; j<=i; j++) {
update_val(j,i,1e5);
}
}
for(int i=0; i<n_max; i++) {
for(int j=0; j<n_max; j++) {
tmp[i][j] = make_pair(-2,-2);
}
}
//cout << "\n";
for(int i=0; i<a[0].size(); i++) {
vector<int> tmp;
for(int j=0; j<a.size(); j++) {
tmp.push_back(a[j][i]);
}
gen_v_seg(tmp, i);
}
for(int i=0; i<n_max; i++) {
for(int j=0; j<=i; j++) {
update_val2(j,i,1e5);
}
}
fenwick f;
f.reset();
long long ans = 0;
for(int i=0; i<a.size(); i++) {
for(int j=0; j<a[0].size(); j++) {
if(v_map[i][j].size()<5 || h_map[i][j].size()<5) {
for(auto &p: h_map[i][j]) {
for(auto &q: v_map[i][j]) {
if(p.first>=q.first && p.second<=q.second) {
ans++;
}
}
}
} else {
auto it = v_map[i][j].begin();
//sort(h_map[i][j].begin(), h_map[i][j].end());
for(auto &p: h_map[i][j]) {
f.update(p.second, 1);
}
sort(v_map[i][j].begin(), v_map[i][j].end());
for(auto &p: h_map[i][j]) {
while(it!=v_map[i][j].end() && it->first<=p.first) {
ans+=f.query(it->second);
it++;
}
f.update(p.second, -1);
}
}
}
}
return ans;
}
Compilation message
rect.cpp: In function 'void gen_h_seg(std::vector<int>&, int)':
rect.cpp:41:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=1; i<x.size(); i++) {
~^~~~~~~~~
rect.cpp: In function 'void gen_v_seg(std::vector<int>&, int)':
rect.cpp:87:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=1; i<x.size(); i++) {
~^~~~~~~~~
rect.cpp: In function 'long long int count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:111:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0; i<a.size(); i++) {
~^~~~~~~~~
rect.cpp:125:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0; i<a[0].size(); i++) {
~^~~~~~~~~~~~
rect.cpp:127:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0; j<a.size(); j++) {
~^~~~~~~~~
rect.cpp:140:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0; i<a.size(); i++) {
~^~~~~~~~~
rect.cpp:141:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0; j<a[0].size(); j++) {
~^~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
489 ms |
356728 KB |
Output is correct |
2 |
Correct |
487 ms |
356692 KB |
Output is correct |
3 |
Correct |
484 ms |
356728 KB |
Output is correct |
4 |
Correct |
485 ms |
356728 KB |
Output is correct |
5 |
Correct |
494 ms |
356700 KB |
Output is correct |
6 |
Correct |
492 ms |
356692 KB |
Output is correct |
7 |
Correct |
481 ms |
356728 KB |
Output is correct |
8 |
Correct |
488 ms |
356736 KB |
Output is correct |
9 |
Correct |
486 ms |
356732 KB |
Output is correct |
10 |
Correct |
594 ms |
356856 KB |
Output is correct |
11 |
Correct |
498 ms |
356700 KB |
Output is correct |
12 |
Correct |
519 ms |
356764 KB |
Output is correct |
13 |
Correct |
505 ms |
356728 KB |
Output is correct |
14 |
Correct |
481 ms |
356600 KB |
Output is correct |
15 |
Correct |
480 ms |
356600 KB |
Output is correct |
16 |
Correct |
488 ms |
356572 KB |
Output is correct |
17 |
Correct |
501 ms |
356728 KB |
Output is correct |
18 |
Correct |
501 ms |
356728 KB |
Output is correct |
19 |
Correct |
481 ms |
356660 KB |
Output is correct |
20 |
Correct |
476 ms |
356600 KB |
Output is correct |
21 |
Correct |
483 ms |
356692 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
489 ms |
356728 KB |
Output is correct |
2 |
Correct |
487 ms |
356692 KB |
Output is correct |
3 |
Correct |
484 ms |
356728 KB |
Output is correct |
4 |
Correct |
485 ms |
356728 KB |
Output is correct |
5 |
Correct |
494 ms |
356700 KB |
Output is correct |
6 |
Correct |
492 ms |
356692 KB |
Output is correct |
7 |
Correct |
481 ms |
356728 KB |
Output is correct |
8 |
Correct |
488 ms |
356736 KB |
Output is correct |
9 |
Correct |
486 ms |
356732 KB |
Output is correct |
10 |
Correct |
594 ms |
356856 KB |
Output is correct |
11 |
Correct |
498 ms |
356700 KB |
Output is correct |
12 |
Correct |
519 ms |
356764 KB |
Output is correct |
13 |
Correct |
505 ms |
356728 KB |
Output is correct |
14 |
Correct |
481 ms |
356600 KB |
Output is correct |
15 |
Correct |
480 ms |
356600 KB |
Output is correct |
16 |
Correct |
488 ms |
356572 KB |
Output is correct |
17 |
Correct |
485 ms |
357232 KB |
Output is correct |
18 |
Correct |
483 ms |
357080 KB |
Output is correct |
19 |
Correct |
490 ms |
357240 KB |
Output is correct |
20 |
Correct |
489 ms |
356908 KB |
Output is correct |
21 |
Correct |
494 ms |
356956 KB |
Output is correct |
22 |
Correct |
488 ms |
356956 KB |
Output is correct |
23 |
Correct |
482 ms |
356936 KB |
Output is correct |
24 |
Correct |
517 ms |
356984 KB |
Output is correct |
25 |
Correct |
501 ms |
356728 KB |
Output is correct |
26 |
Correct |
501 ms |
356728 KB |
Output is correct |
27 |
Correct |
481 ms |
356660 KB |
Output is correct |
28 |
Correct |
476 ms |
356600 KB |
Output is correct |
29 |
Correct |
483 ms |
356692 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
489 ms |
356728 KB |
Output is correct |
2 |
Correct |
487 ms |
356692 KB |
Output is correct |
3 |
Correct |
484 ms |
356728 KB |
Output is correct |
4 |
Correct |
485 ms |
356728 KB |
Output is correct |
5 |
Correct |
494 ms |
356700 KB |
Output is correct |
6 |
Correct |
492 ms |
356692 KB |
Output is correct |
7 |
Correct |
481 ms |
356728 KB |
Output is correct |
8 |
Correct |
488 ms |
356736 KB |
Output is correct |
9 |
Correct |
486 ms |
356732 KB |
Output is correct |
10 |
Correct |
594 ms |
356856 KB |
Output is correct |
11 |
Correct |
498 ms |
356700 KB |
Output is correct |
12 |
Correct |
519 ms |
356764 KB |
Output is correct |
13 |
Correct |
505 ms |
356728 KB |
Output is correct |
14 |
Correct |
481 ms |
356600 KB |
Output is correct |
15 |
Correct |
480 ms |
356600 KB |
Output is correct |
16 |
Correct |
488 ms |
356572 KB |
Output is correct |
17 |
Correct |
485 ms |
357232 KB |
Output is correct |
18 |
Correct |
483 ms |
357080 KB |
Output is correct |
19 |
Correct |
490 ms |
357240 KB |
Output is correct |
20 |
Correct |
489 ms |
356908 KB |
Output is correct |
21 |
Correct |
494 ms |
356956 KB |
Output is correct |
22 |
Correct |
488 ms |
356956 KB |
Output is correct |
23 |
Correct |
482 ms |
356936 KB |
Output is correct |
24 |
Correct |
517 ms |
356984 KB |
Output is correct |
25 |
Correct |
499 ms |
359344 KB |
Output is correct |
26 |
Correct |
505 ms |
359520 KB |
Output is correct |
27 |
Correct |
514 ms |
359416 KB |
Output is correct |
28 |
Correct |
489 ms |
357880 KB |
Output is correct |
29 |
Correct |
499 ms |
358408 KB |
Output is correct |
30 |
Incorrect |
515 ms |
358364 KB |
Output isn't correct |
31 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
489 ms |
356728 KB |
Output is correct |
2 |
Correct |
487 ms |
356692 KB |
Output is correct |
3 |
Correct |
484 ms |
356728 KB |
Output is correct |
4 |
Correct |
485 ms |
356728 KB |
Output is correct |
5 |
Correct |
494 ms |
356700 KB |
Output is correct |
6 |
Correct |
492 ms |
356692 KB |
Output is correct |
7 |
Correct |
481 ms |
356728 KB |
Output is correct |
8 |
Correct |
488 ms |
356736 KB |
Output is correct |
9 |
Correct |
486 ms |
356732 KB |
Output is correct |
10 |
Correct |
594 ms |
356856 KB |
Output is correct |
11 |
Correct |
498 ms |
356700 KB |
Output is correct |
12 |
Correct |
519 ms |
356764 KB |
Output is correct |
13 |
Correct |
505 ms |
356728 KB |
Output is correct |
14 |
Correct |
481 ms |
356600 KB |
Output is correct |
15 |
Correct |
480 ms |
356600 KB |
Output is correct |
16 |
Correct |
488 ms |
356572 KB |
Output is correct |
17 |
Correct |
485 ms |
357232 KB |
Output is correct |
18 |
Correct |
483 ms |
357080 KB |
Output is correct |
19 |
Correct |
490 ms |
357240 KB |
Output is correct |
20 |
Correct |
489 ms |
356908 KB |
Output is correct |
21 |
Correct |
494 ms |
356956 KB |
Output is correct |
22 |
Correct |
488 ms |
356956 KB |
Output is correct |
23 |
Correct |
482 ms |
356936 KB |
Output is correct |
24 |
Correct |
517 ms |
356984 KB |
Output is correct |
25 |
Correct |
499 ms |
359344 KB |
Output is correct |
26 |
Correct |
505 ms |
359520 KB |
Output is correct |
27 |
Correct |
514 ms |
359416 KB |
Output is correct |
28 |
Correct |
489 ms |
357880 KB |
Output is correct |
29 |
Correct |
499 ms |
358408 KB |
Output is correct |
30 |
Incorrect |
515 ms |
358364 KB |
Output isn't correct |
31 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
488 ms |
356988 KB |
Output is correct |
2 |
Correct |
491 ms |
356984 KB |
Output is correct |
3 |
Correct |
483 ms |
356984 KB |
Output is correct |
4 |
Correct |
478 ms |
356600 KB |
Output is correct |
5 |
Correct |
487 ms |
356984 KB |
Output is correct |
6 |
Correct |
487 ms |
356984 KB |
Output is correct |
7 |
Correct |
487 ms |
356928 KB |
Output is correct |
8 |
Correct |
484 ms |
356856 KB |
Output is correct |
9 |
Correct |
483 ms |
356856 KB |
Output is correct |
10 |
Correct |
485 ms |
356820 KB |
Output is correct |
11 |
Correct |
532 ms |
356824 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
487 ms |
356572 KB |
Output is correct |
2 |
Correct |
1126 ms |
424224 KB |
Output is correct |
3 |
Correct |
1985 ms |
503324 KB |
Output is correct |
4 |
Correct |
1860 ms |
504172 KB |
Output is correct |
5 |
Correct |
2040 ms |
504292 KB |
Output is correct |
6 |
Correct |
619 ms |
380904 KB |
Output is correct |
7 |
Correct |
767 ms |
402872 KB |
Output is correct |
8 |
Correct |
740 ms |
406040 KB |
Output is correct |
9 |
Correct |
501 ms |
356728 KB |
Output is correct |
10 |
Correct |
501 ms |
356728 KB |
Output is correct |
11 |
Correct |
481 ms |
356660 KB |
Output is correct |
12 |
Correct |
476 ms |
356600 KB |
Output is correct |
13 |
Correct |
483 ms |
356692 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
489 ms |
356728 KB |
Output is correct |
2 |
Correct |
487 ms |
356692 KB |
Output is correct |
3 |
Correct |
484 ms |
356728 KB |
Output is correct |
4 |
Correct |
485 ms |
356728 KB |
Output is correct |
5 |
Correct |
494 ms |
356700 KB |
Output is correct |
6 |
Correct |
492 ms |
356692 KB |
Output is correct |
7 |
Correct |
481 ms |
356728 KB |
Output is correct |
8 |
Correct |
488 ms |
356736 KB |
Output is correct |
9 |
Correct |
486 ms |
356732 KB |
Output is correct |
10 |
Correct |
594 ms |
356856 KB |
Output is correct |
11 |
Correct |
498 ms |
356700 KB |
Output is correct |
12 |
Correct |
519 ms |
356764 KB |
Output is correct |
13 |
Correct |
505 ms |
356728 KB |
Output is correct |
14 |
Correct |
481 ms |
356600 KB |
Output is correct |
15 |
Correct |
480 ms |
356600 KB |
Output is correct |
16 |
Correct |
488 ms |
356572 KB |
Output is correct |
17 |
Correct |
485 ms |
357232 KB |
Output is correct |
18 |
Correct |
483 ms |
357080 KB |
Output is correct |
19 |
Correct |
490 ms |
357240 KB |
Output is correct |
20 |
Correct |
489 ms |
356908 KB |
Output is correct |
21 |
Correct |
494 ms |
356956 KB |
Output is correct |
22 |
Correct |
488 ms |
356956 KB |
Output is correct |
23 |
Correct |
482 ms |
356936 KB |
Output is correct |
24 |
Correct |
517 ms |
356984 KB |
Output is correct |
25 |
Correct |
499 ms |
359344 KB |
Output is correct |
26 |
Correct |
505 ms |
359520 KB |
Output is correct |
27 |
Correct |
514 ms |
359416 KB |
Output is correct |
28 |
Correct |
489 ms |
357880 KB |
Output is correct |
29 |
Correct |
499 ms |
358408 KB |
Output is correct |
30 |
Incorrect |
515 ms |
358364 KB |
Output isn't correct |
31 |
Halted |
0 ms |
0 KB |
- |